[Bradbury42]

Does anyone else have an experience of anything happening with their partners or wives sister? There been a few things happen to me lately that I'm not sure what to make of.
I'm 25 and I've been with my girlfriend for over 3 years now and she has a younger sister who is 21. I've always got on with my gf's family and her sister in particular as we're quite similar in many ways. Around 3 months ago, she split up with her partner, and she's now living on her own and has 2 kids both under 4, so we do what we can to help her out. My gf however started a new job where she works away Monday to Thursday, so I've been going over myself, helping with little jobs she needs doing, or watching the kids while she cleans up or baths etc.
It's nice as we've gotten closer as after the kids go to bed we'll have a cup of tea and a chat and have become really comfortable with each other.
When i was first going there if she had a bath she'd come back in fully clothed, but as times gone on she often wears little pyjama shorts, and sometimes comes in to make the tea in just her towel. It's bad to admit but she's a very attractive girl. She's quite tall, naturally slim, but has quite big boobs. Overall a very nice body. And I've found myself looking at her when she's in her towel, imagining what's underneath. And i think she must of caught me looking a few times because she'll sometimes smile at me like she knows, but hasn't said anything.
Another time she was in her pyjamas and went out for a cigarette on her balcony, when she came back in her nipples were hard and almost visible through her top. And this definitely made me look!
There's been a lot more happen recently, but was wondering if anyone else has anything similar happen? Any advice before I share the rest of my story