"nothing happened."

most of the time, artists use handprint marks either in a horny sense or in a... ☠️ way.

Dennis is loud in bed -too loud, according to his previous partners. He doesn’t have much experience (a few BJ in bathrooms and things like that), but for what little experience he has, he’s aware that he’s too loud because his flings haven’t failed to point it out to him. And Dennis has always been dumped before things went all the way for this very reason. “You’re cute, I really like you, but your voice... is annoying, sorry” So when things with Robby get serious, Dennis tries to hold back -he bites his lip, shoves his fist in his mouth and bites down hard, anything to keep from making too much noise.

But it’s getting harder and harder, and Robby makes him feel so good…

So the first night they go all the way, Dennis is on the verge of tears because it’s all so beautiful, he feels so good, and he can’t hold back -but he tries, and the more he tries, the more it gets into his head, until at a certain point Robby stops and asks him what’s wrong.

And Dennis collapses, because he’s so tired.

When he finishes explaining, Robby doesn’t say a word. He lifts him off the mattress, presses his back against his chest, and starts fucking him harder.

Dennis, at that point, screams.

an underrated aspect of the housesitting situation is Trinity's response:

"I asked him to give you some fatherly advice, not the keys to his fucking house."

But... we also know that she really trust Robby, because (her own words) he's been the only one to see through Langdon's shit and actually did something about it. Not only did he believe her (although she was just a student) but he also took action.

So... I don't know. Maybe her instinct tells her it's something weird but at the same time she can't rationally believe Robby would behave in an appropriate way.