You just found your little Step-Sister in her room diapered and dressed like a baby. She isn't upset or embarrassed though. In fact she wants to play with you! She promises to make it feel so good for you if you'll let her put you in a diaper too. You get so hard and turned on from her teasing you with her soft voice, her cute little titties, and showing off how good her butt looks in diapers, she decides she's going to have to do something about it before she can finish getting a diaper on you too. She licks and sucks your cock until you can't take it any more - but she doesn't want you to cum in her mouth; she wants you to cum in your diaper! She begs you so sweetly, you just can't say no. She gently wraps the padding around your throbbing shaft, and gives a soft, crinkly handjob while she touches herself, until you both cum in your diapers together! Aren't you glad you let your little Step-Sis have her way?