Sister's boob job
My sister is 36 and divorced. She was always pretty average looking until recently. To get back in the dating game, she's been working out a lot, got a boob job, new hairstyle and makeup. She looks hot, although I never thought of her like that before.
She came over a while back and we were alone, just drinking coffee and chatting. I jokingly asked to see her new tits and to my surprise she lifted up her shirt and then unhooked her bra. She let me touch them and, after I asked, let me suck them. Her nipples perked up and looked amazing. She was obviously turned on, breathing deeply too.
I sucked her tits for a couple of minutes and then she said, "Stop it, you're going to make me cum, and that would be gross." She put her bra back on, pulled down her shirt, and that was that. I see her all of the time, but we never bring that moment up.