Unexpected advantage

Goku stops moving entirely, he exits Kefla, not finishing for his second time or finishing her off. He looks distressed, and suddenly lets out a primal scream before falling over.

"WHIS, WHAT HAPPENED?" Beerus demands

"It seems he over exerted himself. Ultra instinct is very difficult for the mortal body to hold, and sexual intercourse can be one of the most intense things they can do. And with a fusion like kefla... I mean can you really be surprised" Whis laughs

Beerus isn't laughing though.

Heavy breathing, Kefla composes herself and gets up.

"I-is that it?" She yells. "That's the great son Goku? This is universe 7's strongest? He couldn't even break me, he couldn't even make me finish in bed, and now i'll finish him in battle"

With that, Kefla eliminated Goku, victorious.