I'm unsure as to whether you can get Fawn pregnant yet, but if you can, you won't need to convince her to be a subbe.
As for how to get her comfortable with subbing, it's just a matter of teasing her enough, but not too much.
But how? I tried every single way during the Shibari training when i walked her out.
I did it by only buzzing in the hardware store, but I'm certain that there are several other ways to do it.
Just have a successful date, then invite her to your sex dungeon.
Lust Doll Plus Wiki (miraheze.org) here
After tying her up with rope and going out on the town, just invite her to your sex dungeon(after getting THAT set up), and you can have her be subbe(you can even give her a dick if have the toggle and spell)!
