[jeff_f]

Last month I started work at the campus bookstore at my (decently-sized) University.
My supervisor is a grad student named Sarah. She's maybe 26-29, cute, a little chubby (not very chubby at all but not exactly fit), nice, nervous-type. Always mumbling to herself. Mind all over the place. Training was interesting, she kept rambling and going off on tangents about things I didn't need to know, then apologizing. She seems very smart but not the best with people. I like her though. She smiles a lot and she doesn't mind if I'm a little late or if I need something explained again. She just apologizes for not explaining it well enough before, haha.
Sarah has wide hips and a cute little belly (again not protruding at all, she's not fat just soft). Small breasts. I feel guilty sexualizing her but there is one thing about her that drives me crazy. I can't help it. The one thing I can't resist is a woman's underwear accidentally exposed, and Sarah is extremely bad (or good) with this, more than anyone I've known. The crazy part of Sarah is that it's got to be unintentional. I've known people who have shown their thongs on purpose, or had trendy waistbands sticking out on purpose, or carelessly had underwear sticking over loose sweatpants. For some reason, those things don't do much for me. If it looks like an accident, an embarrassing accident, it drives me crazy. And that's Sarah. Very unique for someone her age not to have that figured out already. Either they know how to keep it hidden, or they've learned not to care. It could be that Sarah's lost some weight and is getting used to her new body. She does have faint stretch marks and I know she hasn't had any kids.
I've worked with her five times already. I can tell you exactly what underwear she was wearing each time. It's exciting just thinking about it: I and everyone else working there, plus many people going into the store, have clearly seen Sarah's underwear. A lot of it shows. It's hard to ignore. Today was the most obvious show and it was what inspired me to write this post, because it was the first time I can say she was unmistakably embarrassed about it.
We have a simple uniform, it's a tee-shirt or polo shirt (we get both) plus an ID lanyard. We can wear whatever bottoms we want. Sarah is a jeans girl. When I met her the first day for training, she had on the tee-shirt and it came barely to the top of her blue jeans. I'm tuned in to that sort of thing so I noticed right away. I couldn't really look because she was intensely talking to me, very polite but all over the place. As we were finishing the basics, she asked me to follow her around the store to show me where everything was. She was talking over her shoulder but I could steal glances down to her waist. The jeans were too big and the shirt easily bunched over it. A strip of white cotton was visible between the shirt and jeans, and I looked up her back to see if it was an undershirt. It wasn't, the outline of her bra was too prominent in the back. As she walked, she continually reached down to her sides to tug her shirt down, but it only took a few steps for it to slide back up. All I could see was cotton but I was really hoping she would lean over so I could see the band. I was nervous she would see me looking and I was trying to pay attention but it was tricky. The most I saw was an inch before she covered up again. The jeans were sliding down too and she pulled them up two or three times. She looked uncomfortable. All the adjusting told me she did not want her underwear exposed. When we were done, she took me to the counter to sign forms. She was leaning over, elbows on the counter, and I knew if I was behind her I would be able to see more. I think she knew too because a coworker walked in and she straightened up and pulled her shirt down. She wasn't blushing or anything but it must have been on her mind. I really wanted to see what she was wearing. I shadowed her for 4 hours that day and had some close calls. I almost gave up but then she took me to the door to show how to lock up. Part of it is you have to reach up to the top of the door. She is not very short but short enough that she had to get on her toes. I pretended I was getting a better look at the lock and walked around to the other side of her. Glancing down I saw her shirt pulled up and her jeans sagging down and away from her body. I was surprised to see how much of her white cotton panties really were showing. The band was out in the front and more in the sides, in the back you could see the band plus two inches of cotton. From my vantage point I could even see down a tiny bit between her body and her jeans. It was a very large amount of underwear showing. I was not used to it, and I was beginning to get hard. It was only 5 seconds but my heart was pounding. She secured the lock and moved her hands down very fast. She pulled up her pants and her shirt down. I wasn't sure at the time but now I am sure she was embarrassed at the exposure. I unlocked and locked it again to show I was paying attention and I pretended that I was looking up at it the whole time. I was really scared she would catch me looking but she didn't. We left soon after that but I was captivated. The underwear was standard full back from Hanes, very cute and unassuming. My favorite. It was on my mind about Sarah from then on. Something exciting about work, knowing if we worked together, which has been one or two times a week, she might have a panty slip.
At this time I can't go into detail about the other underwear shows. It would take too long. Maybe later. I can say the second time was a long jean skirt and white Hanes again, the third time was a jean skirt above the knee and VS full backs with flowers, and the fourth time was the jeans from the first day (or a pair very similar) and white Hanes again. The shows on those days were as much or almost as much as the first day. The shorter skirt and the flower panties was on a busy day with lots of parents (it was Parents' Weekend) and Sarah was sweating and walking around a lot. She was busy and seemed stressed out and her face was red. She did a lot of adjusting. I saw her panties several times but no long looks because so many people were around. I did catch more than ten parents and students looking when Sarah was bending or reaching. I got really turned on that day and at one point I had to go to the bathroom to let my erection subside. It was when I saw Sarah on a step ladder (not very high, the shelves aren't very high, so nobody could see up her skirt) and she was reaching up with one hand while holding the back of her skirt to her body with the other. Very modest for not letting people see up her skirt but it made a lot of her underwear show at the top, as much as the first day, and she was higher up than everyone and people were watching and she was clutching her skirt. I could feel her being embarrassed and it was so hot. Seeing her up there with the flower printed cotton and knowing that lots of people could easily see that she was wearing Victoria's Secret. She was blushing when she got down. I almost masturbated in the bathroom but I was too afraid of being caught, so I kept a half to full erection the whole shift until I had a much needed release as soon as I got to my apartment.
I have become friendly with Sarah during this short time and she looked happy to see me when I came in today. We talk about classes and TV and friends. We have the same sense of humor. We joke with each other but in a very surface way, technically she is in charge of me, not exactly my boss but it is professional. I would not feel at all comfortable joking about her underwear. We have a lot in common. She is very sweet, and I try to be very careful about never letting her think I'm looking at her underwear or worse, being turned on by it. Today she was wearing another pair of jeans. They looked older and longer. They were frayed at the bottom and she was kind of stepping on them. She was pulling them up a lot. Through the day I caught glances of her panties. They were red cotton, and they stood out against the shirt (I don't want to give away our University colors but they are not red). In the last hour before closing, we were bringing books out together to put on shelves. There is usually a cart for that but it was being used to hold overflow books so we were just holding them. When Sarah had an armful of books she could not pull her shirt down or her pants up. There were not many people in the store, but she still was being careful as much as possible. She brought a load of books, put them on the floor by bending with her back to the shelf, and then pulled her pants up. I hope I am being sneaky as I notice that. One time she had a load of books, a student asked her a question. I went into the row she was in to help (but really hoping to see her panties). She had to bend over to put the books down with her back not facing the shelf but facing directly away from the student. I walked into the row just in time to see her bend down. Her red panties were very visible from behind because her jeans had sagged down a lot, and I could see the Hanes band on them. It was a quick glance because I didn't want the student to see me looking. Sarah bounced up and pulled up on her jeans and I grabbed the books and said I would finish putting them away. Sarah said thank you and I was sure she was blushing because she knew I saw. If that wasn't hot enough, right before we left I walked into the back office when Sarah was there. She was on one of the computers, and as luck would have it she stood up and reached behind the monitor right as I walked in. I suppose she was reaching to get something but when she heard me she looked back with a very embarrassed expression and her hand shot back to her pants. My eyes naturally followed and I saw her touch the back of her panties, feeling how exposed they were (it was a lot) and then pull up on her pants. It was a moment where we both knew I saw her panties, but I don't think she blamed me because she moved her hand so fast. I looked away and said Oh sorry. Not making it clear what I was sorry about. I asked her a question and she answered, both of us not looking at each other. I didn't see her again until the end of the night. I locked the door for her and we walked out. We were both going to the same area of campus so we walked together for a while. Of course we were too embarrassed to talk about her underwear. That would not have been appropriate anyway. We had an awkward conversation. It was cute how embarrassed she was even though she is probably a few years older than me (I'm 23.) As we walked I noticed she was pulling her shirt down a lot in back, but her messenger bag was pulling her shirt up on the side, exposing an inch of red and the band of her panties (enough to see Hanes two times) and some of her skin. I had a full erection so I was embarrassed enough myself trying to hold my bag in front. Though awkward, the conversation was friendly. I'm starting to like her but I think it might be wrong. I had to write about it because it's a very exciting situation for me. I really wanted to touch her panties and hug her and kiss her even but I would never do that. She's older and in charge of me and I'm shy anyway. But I can't wait to work with her again.