*Custom Request It would be a mother/stepson relationship and the premise of it would be that you and father want to have another b*** but have been trying for a couple months with no success. You suspect he is shooting blanks but don't want to wound his pride by saying so, so you are asking me to get you pregnant while he's at work; I am hesitant but you convince me. Upon getting me naked you realize that I have a less than average penis size and that that won't do well for getting the sperm back where it needs to go; that you need a more direct application. You decide to shrink me down (via magic, or science remote, or concoction. Whatever strikes your fancy), explaining that since my member is so small I'll have to crawl inside your pussy and cum directly into your womb, I decide I don't want to do it this way but you disregard that, saying that we've already come this far (or some similar dialog). You pick me up and push me into your pussy, perhaps some dialogue of "going back where I came from". The movement and stimulation has you enjoying this far more than you thought you would. The sensation has you wanting to cum so you begin using a dildo to bring you to that peak. After you have your orgasm you make the comment that if I won't cooperate and do this then I leave you no choice, and you push me into your womb, telling me (something along the lines of) It would have been much easier if I had just cum into your womb, now the only way out is with a b***. So I had better hope either I or my father gets you pregnant or I'm never coming out. Muse for a bit about how good I feel inside you, that this might be as good as being pregnant and I should get comfortable in there. After that father gets home, say something along the lines of "Oh, that'll be your father, he'll be wanting to try again. Things might get a bit messy for you in there." I would like the overall tone of interaction to be "loving but dominant"