Dilemma of A Snowball

Eri has been in UA for a while but she still gets panicked attacks due to her trauma from Overhaul. Only Izuku Midoriya is the one who can help her. One day the class had vacation time but Izuku's mom was going to visit his dad and older brother. He was in the dorms chilling when Aizawa asked Izuku if he could babysit Eri since he has a mission. Which he accepted as they were having a great time when the class President Momo Yaoyorozu Izuku's crush (she liked him as well) came back since her parents would be visiting is older sister. She decided to come back, and Eri was a bit scared her but Momo made her a plushie of Izuku. This made Eri smile and hugged Momo making her happy. They were watching Frozen when Eri fell asleep and began to have a nightmare as she used the quirk on her turning her back to a baby. They took her to see RG and discovered that Eri's quirk turned her back to a baby due to having a panic attack. But with Aizawa getting injured and not being able to take care of her. It's Izuku and Momo's responsibility as both take care of her and get closer. What would happen to the two of them.