I mean, Momo is fucking moronic.
"For all I know, you could be dead tomorrow. So instead, I'mm gonna tie you up, the person on watch, and mate right now. Even though we were ambushed while you mated with Misaki".
Not that he was much of a lookout...
Also, girls were awake when she screamed, and for all they knew she was being gang raped by Kalls, but still did nothing, so...maybe she woke them up?
Eh, whatever.
Also, nice way of keeping a secret, screaming "I'll mate with you" in the middle of the city.