Guys they're not going to fuck, right before the chapter ended she covered him with a blanket and is doing so in a maternal manner. She's getting closer to him because it's finally been revealed to her what he wants to do and because they're both thinking in a similar fashion of sorts she's obviously going to get much closer to him. She's not looking at him in a lover sort of way but in a partner in crime to escape jail and here they're building a bit of kinship by being physically closer.
Looking at it from a little further away, it's kinda clever how she might be further manipulating him. She could be lying here and wants to stay with her family and is doing this to pressure him into a corner until he either gives in to his family's wishes or actually decides to leave.