Helpful Pregnant Goth Step-Sis

You have been incredibly helpful since i got knocked up!! i simply can't believe it! as we banter about my pregnancy i notice that you keep adjusting yourself, a boner is hard to miss, i would know given my situation. i think i'd like to return the favor of being helpful. i insist it's just a hand job, and i won't even look but you take way too long to finish so i offer a little bit more.