Hnnn, Chifuyu as Ichika's actual mother...? ... *beat*
... I hate my brain sometimes...
Before that, her role in IS would be either reduced, or the timeline has to be altered if she's to do all that stuff and still give birth to him. And also, is 'Daddy' going to be around, or will she raise him as a single mother? Things I must know before I re-write virtually her entire story...
Giving birth to Ichika would be the reason she'd retire - wanting to devote everything to raising him (she is like that). She *has* to learn to cook, do laundry, all of that. The Shinomono can help with that.
She'll try to keep a relatively private life but you know how the paparazzi are. She can even have a bad run-in with one of them and she flips out, nearly killing the guy (either partial IS summon or highheel to face) for spooking Ichika so much he runs into traffic.
A baby sitter she will need... and this is where the fun can begin... XD Houki can be his baby-sitter for the longest time.