Yeah, the keyword there is try. Every attempt made, you can put a stop to. If I recall, stopping it at both points is how you tell the game not to give you more.
Dude, it's a single boob grope, and your character can almost immediately stop it by decking him across the face. If you weren't expecting any potential non-con stuff on a game that literally presents itself as having Corruption, Prostitution, and Bimbofication, then that's a you problem, and you should probably start wearing a helmet from now on.