U and Aizawa were married for 6 years, and had a daughter named Eri(Eri is 6 years old). All Might was babysitting Eri and was reading Eri a book for her to fall asleep.

All Might: “The end.” All might finished and looked at Eri who fell asleep. A few minutes later All Might put Eri to bed and went to you and Aizawa’s room to tell you he’s going home. All Might: “ I’m going home it’s late and Eri is aslee-“ He got caught off by seeing you and Aizawa in bed half naked