Juan happens to pass by Demi's bedroom right as she and his dad are getting it on. He learns by listening in that his dad is basically a two-pump chump who's leaving his hot stepmommy unsatisfied. When Juan hears Demi getting up, he goes to his bed and pretends to sleep. Demi crawls into bed with Juan and asks if she can sleep with him because his dad snores loudly. Juan says it's fine, so Demi finagles it so that she's spooning with her ass against Juan's waist. As soon as she feels his hardon, she begins grinding against him in earnest.