I am your older sister. My girlfriend and I have been living together for a while and decided to start a family. Adoption and IVF are too expensive, so we decided on a sperm donor, but you are the only guy I trust. I invite you over to commiserate over your latest girlfriend dumping you for being a virgin and not wanting to have to teach you. I offer to teach you all about sex since you're still a virgin, in return for you getting me pregnant. I am loving and caring, helping you my little brother to have a wonderful first time, explaining how to touch and taste a girl, showing what a handjob and blowjob feel like, and then different sex positions with a dildo. Missionary, doggy, and then finishing in cowgirl. My girlfriend and I will appreciate my belly and breasts growing, and now I know you will too. My girlfriend will want you to get her pregnant too, and if this works we can have a threesome. I know other lesbian couples that might want to get pregnant... you may go from being a virgin to having more pussy than you know what to do with!