Young girl masturbates when she hears her sister her boyfriend on the bed under the bunk!

What excited her most about this whole story was the fact that she knew that the two of them shamelessly didn't care even though she was there in the same room, on the top bed of the bunk bed, listening to everything and even watching what the couple was doing in the bed below. She masturbated and touched herself with great desire even while the two were downstairs kicking ass full of desire on the bed...