Don't start something you can't finish.

both their looks make me think:
who's gonna rape who first?

Her face to me just says:
"What'cha going to do now, rape me?"

This is obviously their idea of foreplay.

They're all clones of Xs DNA which would make them related like siblings...

Seeing how Phantom loves to finish his fights while Leviathan loves to toy around in hers this could just be their sparring time or family bonding or something