Nothing wrong with the woman being aggressive. But she has to realize her partner is to type to delude himself into thinking she doesn't mean what she is saying. So she needs to stop asking what he thinks and start telling him what she thinks. That way he can't weasel his way out of it by using the ambiguity of the words used.
FYI Japanese people use the word bitch in a similar fashion to the word slut in some instances, so in this chapter it's probably more appropriate to swap the two.