...give your Stepdad a blowjob.

You agreed to provide this service, so now that's what you have to do.

Accepting your place, you kneel down in front of your Stepdad. He pulls his pants down a little, and his swollen dick flops out in front of you. It's not fully erect yet, and it's already impressive. You understand that although your penis is a good length, it's only a boy's dick as soon as you lay eyes on the MAN's dick in front of you. You suddenly feel feminine and submissive by comparison. If you hadn't fully accepted your role as his cocksucker before, you have now.

You willingly lean forward, open wide and take your Stepfather's enormous penis into your mouth. Your head spins, feeling that bulky thing slipping between your lips. He groans with pleasure, having a hot, wet young mouth suckle him.

Okay, your stepdad's dick is in your mouth, and yeah, you're kind of blowing him, but are you really willing to take this to it's obvious conclusion?