Stephanie has volunteered to test a new mud mask product. She arrives to the lab and is greeted by lab tech Penelope. She tells Stephanie to disrobe so she can start the process. Penelope tells her that she might feel side effects, with one being arousal. As the mud goes up her body, Stephanie becomes aroused as expected. Penelope tells her it`s fine and just just enjoy it. Stephanie then starts to feel it stiffening her body, but still can`t help being aroused as Penelope rubs the mud on her tits. Next is Stephanie`s head and face, but before that, Penelope gives Stephanie a kiss. Penelope then strips nude and starts to finger fuck Stephanie`s muddy pussy. Penelope then takes some of the mud and finger fucks her own pussy. Both girls cum hard. Poor Stephanie can only stand there as a mud statue and moan as she keeps having her orgasms.