You've been recruited to take the super-soldier serum and are in Avengers HQ waiting to be tested. Black Widow is here to observe and she asks you to react normally and to not hold back even if the tests seem...unusual. She unzips her bodysuit and exposes her breasts getting just the reaction she was hoping for...an erection. Black Widow is impressed, claiming you to be MUCH bigger than Cap. She goes down on you for a bit before hopping on for a ride. You slip into her wet pussy and watch as her tits bounce. Once you both cum, she says testing is complete and that you're going to be a great soldier. ;)