Actually, her body language seems to be about demonstrating affection rather than inviting more sexual play. I think maybe the handjob was a little much and this is her way of making sure that things are okay between her and Russ. If so, he's doing exactly the right thing - reassuring touches, engaging conversation, showing her that he still enjoys just spending time with her doing things unrelated to getting his rocks off. It might also be related to wanting to feel comfortable sleeping beside him for the first time - a girl's gotta really trust a guy to be that vulnerable with him and some reassurance would help with that. Doesn't look like foreplay to me, but the entire relationship dynamic between these two still has me baffled in a few places. Honestly, I just can't tell. She'll probably just drift off to sleep soon, but if she yanked the covers off and sucked his cock I'd be only a little bit surprised.