I (25M) have known this girl (26F) since junior high. We started hanging out again as adults and her tits have become *huge*. I’m talking G cups. Of course I try to be polite but even I can’t help but stare sometimes. We have one of those more intimate friendships where we don’t mind getting touchy. She would actually let me jokingly squeeze her tits. We shared a lot too. She was a virgin, and she confessed to me that one of her fantasies was having a guy suck on her nipples…
So, one night a couple of years ago I was at her apartment playing Mario Kart (ya know, as normal adults do). Of course I lightly groped her boobs a few times as usual, and she just laughed at first. But at one point she paused the game, looked right at me, and said that her nipples were hard. Taking this as a hint, I started to squeeze her tits a little rougher, and she let out a little moan.