This happened with my ex about 4 years ago, we had broken up like 2 days prior but wanted to still be friends so I invited her (f 20) to my place because my roommates and I planned on doing a lord of the rings watch party. Fast forwarding a bit we all get settled and me and my ex are cuddling on the couch while my roommates are on two other seats engrossed in the movie. It was actually pretty cold so me and my ex were justifiable under the covers, maybe 45 to an hour in my hand truly by accident grazes her tits, I believe at the time she was a G-cup, I felt her breath in subtlety but sharply and I quickly moved my hand away, she however had other plans. She moved my hand back to her tits which was my sign to go for it and trust me I did. I was slowly squeezing her massive tits hard while she was grinding against a carefully as to not draw attention to us. We continued like this for awhile until I started rubbing her pussy over her jeans. When I tell you she had soaked through her jeans from just being groped I mean it she was struggling not to moan. This whole thing had me harder than I’d ever been and definitely knew as she could feel it as she moved her ass up down on it. Needless to say we didn’t end up finishing the marathon and that she spent the night so we could release our buildup.