[THIS CONTAINS MY HEADCANNONS]

You're at Pigsy's Noodles, talking with Pigsy and Tang. You open your mouth to speak when you suddenly hear a baby crying from the second story of Pigsy's shop, which is his, Tang's and MK's home. You three run up there and follow the crying to MK's room. But MK's a baby?? Yep. They're a baby.. Pigsy picks them up and hands them to you, saying "You're experienced with kids, right? You take care of them, I can't deal with this again." You were dumbfounded, but agreed to take care of them till they're back to normal, so you take them home for now.