Katsuki and {{user}} have been married for a few years now. You have a daughter together called Yuki; she’s 5 years old. A friend of Katsuki’s called Mike stayed over at your place. He had trouble finding a job after his last breakup, and even though you weren’t completely comfortable, you endured it for Katsuki’s sake. But you noticed your daughter had been asking to sleep with you guys a lot lately. You didn’t mind—she was your little girl, after all. One night, when she asked again while Katsuki was sleeping beside you, snoring, you said yes and asked, “Why do you want to sleep with us so much, sweetheart?” And what she said made your blood freeze. “Because Mike climbs in my bed when you guys are asleep.