Imagine having a threesome with Issac and Abel? The both of them would look so pretty taking turns bouncing on your thick cock. It doesn't matter if their legs are shaking, their holes are overflowed with your cum, and their dicks are soft from cumming too much. They will get on that cock until they are satisfied.
They go at it from dusk to dawn, taking very little breaks, until the point of near collapse. And, once they’ve rested, they’re straddling you again and clinging to you like you’ll escape (as if). You’re the one who has to put a stop to it, because you and Isaac need sustenance, even if he’s more interested in riding your cock. Abel slumps against you, frowning impatiently as he waits for you and Isaac to recover.
The second you do, Abel is pushing you down to have his turn, drooling all over your cock and stroking it to full hardness.