Spinner absolutely would be the dad who stepped up, he'd love watching Dabi be all gentle and motherly with the baby. Tbh he might even prefer it because I hc he'd have massive internalised self hatred about passing his quirk down (thinking the incest baby is better than his own baby 🥺). And he'd probably be good support for insane grieving widow Dabi.
(apologies if that post was only okay for you to make and you still don't want asks like these!)
(I think I'm okay on this topic in particular bc it doesn't involve pregnancy, childbirth, or miscarriage, etc, and I'm more thinking of an au where the baby has already been born and all the pregnancy stuff is skipped over. It's mostly the pregnancy/childbirth/marriage topic that I avoid)
I am definitely really debating like. A little oneshot. My roommate and I have been watching game of thrones and every time Sam and Gilly are on screen it's just soooo tempting to make a spinnerdabi au. We already have, like, a running bit that we can watch anything and find a way to make it about spinnerdabi but I'm reallyyyyyyy getting tempted with Sam and Gilly.
I'm thinking. Like. A post canon au. One of those typical house arrest ones where Touya was under Enji's care. Shuichi like breaks out of custody or something and goes to "rescue" the only surviving member of his team now, just to find Dabi's, like, got a lot of shit going on and has a newborn with Enji bc of the sa. So naturally Shuichi convinced Dabi to come with him and they go on the run or whatever <33 idk mostly focusing on little relationship stuff and bonding moments and like you said Touya being gentle and parental with the baby (he'd be a good parent fight me) and Spinner and Dabi kinda falling in love and all that. Idkkkk I'm just thinking about it