Couple of notes from someone that read most of it.
While I can not exactly remember how other pregnancies treated the pronouns of choice for our character if we played as a cboy/male herms, I do find it little weird how in some instances you use proper parental titles like "dad" and sometimes you substitute to it with neutral words like parent. I think you only used it few times, but it feels weird -- especially when the female noun you used is in the vain of mom.
The pregnancy talk read little bit tackles and mood killer. Now, this is coming from a guy and I am not sure how our female readers feel about it, but his sudden proclamation on how he can not hold himself back from knocking us up... While I get that is a warning, it makes him look desperate in non sexy kind of way. I think there are ways to make his "need for breed" a lot more arousing and compelling, since there is something inherently empowering in idea that a guy can not really hold himself back around you. Especially when you can expirience it from the safety of your computer/phone/tablet.
I am kind of suprised, and glad, that you still involve Kiyoko. The scenes are sweet.