Sure, rape is a misused word when it comes to games. "I'm getting raped", things like that, that's obvious.
However, I did not react to this, at all. She was legitimately getting beaten during the fight. He obviously knew some good combos and was hitting down on her, hard. She was like "Who thought this was a good idea?!" "Don't worry, it'll be over soon", as a legitimate "I'm beating you, obviously, but don't worry".
I thought it was awkward "banter", but I think it's overreaching saying it was a rape-joke. OK, apparently people made the connection, but the discussion becomes if everyone needs to ensure they don't say anything that's of wrong connotation, or if those making the connection need to calm down.
I'd like to think it's a bit of both, and in this case, I think it's overreaching.