Nicky wants a little brother. He'd like one so he can practice what it'd be like to be a father. Nicky will ask his stepmom Mandy why he doesn't have a little brother as of yet. Mandy will explain that his dad is shooting blanks. She'll also start getting the formation of an odd idea in her mind. But before she can act on that idea she needs to know a few things about Nicky. Since he's already confessed that his girlfriend dumped him Mandy will ask if he actually knows how to please a woman. Nicky will staunchly defend his sexual prowess but Mandy has her doubts. Exposing her small natural tits and her trimmed pussy she'll make Nicky finger her. It's bad...she'll have to educate the poor guy. Eventually he gets the hang of it and fingers her to orgasm...she's ready to unleash her grand idea. Nicky can impregnate her. Same basic gene pool as his dad and he'd have his little brother. And she's all ready and warmed up for a load of cum. Nicky ain't ready to bone his stepmom and runs off. The next day finds Nicky and Mandy back having the same old talk. His dad is running on empty and she really wants his cum. Mandy thinks that Nicky is just too shy and will attempt to warm him up to the idea of impregnating her. She'll attempt to do this with a quick titty fuck and a blowjob ending with an implied oral creampie. Later on Mandy will summon Nicky to her bedroom. She wants his cum and will debate about the merits of him donating it to her. His dad will feel better because he'll think it's his sperm that did the trick. Mandy will feel better because it will make the family a stronger unit. And Nicky will have that little brother he always wanted. Nicky had better be packing a lot of Y chromosomes for that to happen. Since Mandy won't take no for an answer she and Nicky will engage in the following: blowjob, doggy style, cowgirl, reverse cowgirl, and missionary sex. Nicky will give her a vaginal creampie and she's still not done. There'll be more attempts until she finally gets knocked up.
