We were watching some porn together and saw a gal licking her titties and nipples, and my wife saw how it got to me. I confessed to the huge turn on I get from seeing that. She bemoaned her smaller boobs and was sure she never could get there.
A little coaxing from me, and some experimentation, and she made it. Check out those large nipples- they are super sensitive- she can almost cum from my sucking and squeezing on them. When she realized how good it felt, we were off to the races. She took these shots herself while at home one day when I was out. She confesses that she does it often when she masturbates, and I can you tell she masturbates a lot.