Ughhhh I am so insane about Jason and Damian and younger sibling cging for older sibling...
I was thinking about Damian getting deaged to when he and Jason were in the League together, but during that time Jason was basically perma regressed to REALLY little. So Damian starts huffing about Jason not having his stuff and not being treated right and not taking care of himself/being taken care of. Makes Jason wear diapers again and stuff (of course Jason does have a bag of supplies, he just... Hasn't been using them, because he hasn't felt like it's okay to drop like that). They get in the car and Damian crawls into Jason's lap and a few minutes later shoves a pacifier in Jason's mouth (who takes it and lays his head on top of Damian's). That's Damian's brother, his Feather, and Damian is pissed because no one is treating Jason right like how their Mama does.
Bruce calls Talia when the deaging happens because they don't know how long it'll last (and to get some of Damian's stuff), and when she calls to check in next he tells her about how Damian's been behaving and how Jason's been reacting to it (slipping deeper and deeper each time). But instead of being concerned, Talia just tells him to relax and to bring both of them when he comes to pick her up from the airport. When she gets there, she's got a suitcase of Damian's stuff but also of Jason's from the League (something Bruce didn't know about, and he doesn't find out immediately now either lol).
Jason gets all nervous upset because he feels like he's been bad because he hasn't been taking care of himself right. (Especially when Talia pointedly asks how many accidents he's had.) But Talia just hugs him and tells him it's alright, he's too fragile for that to be expected anyway. Mama's here now... For both of them.
They all get home and Bruce carries Jason while Talia carries Damian because both fell asleep on the way back. Talia gets Damian changed into sleep clothes and then does the same with Jason, including a diaper. Switches their pacis for sleep-safe ones (ones without deco that could be broken off). Tucks them in. Those are her babies. Her sons.
