Alaina gets it too

Soon enough, the other couple decide to follow you and Marlena's lead. Like Marlena, Alaina is on all fours leaning on your bed with Greg behind her. You and Greg are pumping away at Marlena and Alaina's pussies, watching your hard cocks disappear into them.

At first Alaina and Marlena seem a little wary to look at each other. Not a surprise; this is a new experience. But slowly they angle their bodies more together. Their hands touch each other, and then their fingers intertwine as they get fucked from behind. Soon enough they're kissing, eyes closed, mouths locked together. Marlena is struggling to stay upright as you fuck her while she rubs Alaina's pussy. Finally Alaina can't take it-- she breaks the kiss with Marlena and yelps as her arms give out in orgasm, collapsing face first onto the bed while Marlena and Greg continue to pleasure her.

You decide to take a page out of Marlena's own book and reach around her to stroke her clit while you fuck her. An "Oh" sound escapes her, and then another.

"Oh, oh, oh, oh oh oh oh ooooh!" Marlena says, eyes wide. She grabs one of your pillows and smothers herself with it to muffle the sound of her climax, but you don't let up.