Mommy arrives home after a night out and urgently needs to use the bathroom. You ask me to help you nut since your dick is rock hard. I insist on using the bathroom first, but you beg me so I give in to pleasuring you while desperately needing to pee. I grow increasingly frustrated because you're taking too long to climax, but finally make you cum by riding your cock. As soon as you've released your load, I rush to the toilet. I sigh in relief as I finally sit on the toilet and relieve myself. Returning to your room, I explain that I can't delay my bathroom urges to satisfy you and notice you getting excited again. That's when I realize you had me hold my pee on purpose and that you're turned on by female desperation. Disclaimer : step-mom/step-son scenario, son of legal age (“baby”, "my little boy" are just used as cute nicknames)