At first, the pills they took at the lake had driven the Campbell family to fuck anything, everything, they could find. If Lexi had found a good cock-shaped tree knot, she'd have humped that, too. The encounter with the redheaded college siblings -- Kim and Cole, Lexi reminded herself -- at the lake had been part of that. She simply needed them both in that moment.

After the Campbells came home and tried to control themselves, though, an interesting permutation had occurred. Lexi, the whole family really, had started only desiring each other. This wasn't a side effect of the pill, obviously. Family sex was not an adverse event. But...