Cindy Lou Who and her adopted sis, Sister Who are sleeping peacefully as the Grinch sneaks in to steal their Christmas presents. The noise from the Grinch wakes the sisters, who think it might be Santa. They race from their beds, still in their sexy nightgowns, only to come face to face with the Grinch. They run to wake their stepbrother, Brother Who. Brother is very upset to learn that the Grinch has ruined Christmas once again. Cindy Lou is distraught that her brother's upset, but she comes up with an idea to help save Christmas for all of them. Turning to Sister, Cindy Lou tugs her jammies open to reveal her lingerie. Sister gets the hint and does the same to Cindy Lou, and then both girls advance on Brother to spread some Christmas cheer.
The girls start with a double BJ that gets Brother feeling very merry indeed. They share his cock beautifully, exchanging sizzling kisses as they stroke and suck until Brother has risen to full mast. Then Cindy Lou lays back in Sister's arms and lets Sister fondle her titties as Brother fits his dick between her thighs. Urging brother on with her moans of delight, Cindy Lou lifts one leg high to take a hard pussy pounding with Sister's hands pinching her nipples in time to each thrust.
Sister wants some of that action too, so Cindy Lou helps her get into position on her hands and knees. With Cindy Lou holding her tight, Sister is all giggles and moans of delight as Brother bangs her doggy style. Cindy Lou finds herself wanting the same, so the girls swap places and Brother gets to dip his dick in Cindy Lou's hoo hoo. Taking her turn on the bottom again, Sister pulls Cindy Lou on top to give Brother a double stack of pussy delight. He takes advantage, swapping twats until he reaches the end of his endurance. At the last moment, Brother pulls out to cum all over Cindy Lou's lusty twat. As the siblings bask in the afterglow, Cindy Lou declares that Christmas isn't ruined after all.