Assault, to me, is the threat of physical escalation. So if he attempted or threatened to touch her or made suggestive comments or implications, that would be assault.
If he just really wanted to expose himself to a stranger? Maybe lewd behavior or something? He's in his own home and there's nothing illegal about just being naked in your home.
He's gross and deserves to lose his account, but what else do you think should happen?
Indecent exposure is not sexual assault and he was in his home!
It's gross, but the overreaction is ridiculous