Luthor could smash his way into his apartment right now and Clark wouldn't even notice, hyper focused on the sound of Lois’ skin against Bruce's. The soft drag of his chest hair against her skin, her nipples. Fuck, Clark thought dazed.
The slide of Bruce's fingers down her side, he could hear the way the calluses catch on Lois’ soft skin. Clark's skin twitches, the ghost of Bruce's hand smoothing down his side. He throws an arm over his eyes, shaking and shaking and shaking.
Bruce's hand goes down, the rustle of Lois’ pubic hair against his knuckles and then- oh god and then so wet and thick, the soft sound of Lois’ clit against Bruce's fingers and Clark and Lois moan, “Bruce,” in sync.
He can hear it, he can hear it and hear it and hear it. Their hearts racing and their breathing and the way Lois is clenched up around Bruce and the barely there rocking of Bruce pressing and pressing and pressing into her cunt and the almost silent drag of his thumb over her clit and it's too much. It's not enough.
Clark bites his lip and his eyes roll back and he cums like a fountain, fist still locked around the root of his dick.