Let's do this.

When you cum Sam eagerly swallows your load, sucking and stroking to coax out every drop. When she's done with that she stands up, turns around and bends over to show you her ass. She let's one hand travel up her left leg and glides it over her ass before giving it a good slap. Then she pulls her pants down her pants, but her spread legs make it so they don't slip down far. They slip down so little you can't even see all of her ass, but you can see enough of it to fuck it and that's what you both want at the moment.

Lind barely reacts as you push the head of your cock into her ass, but when you slam the rest of it inside her in one go she loudly moans. That encourages you to increase your efforts, so you keep fucking her ass with slow but hard thrusts and pull out almost completely with each one. After fucking Sam's ass for about five minutes you decide to change it up a bit and speed up the rhythm of your thrusts wile trying very hard not to lose the strength of those thrusts. Your failure to do that makes the way you drill Sam's ass unpredictable to her and either she likes that or she was about to cum anyway as she quickly starts to shudder. As Sam climaxes she unconsciously brings her legs together so her pants completely slip off and fall to the ground, showing you why she wanted to keep them up so badly. Between Sam's legs you don't see a delicious slit but a cock that's slightly bigger then your own.