Ranboo and Tubbo wanted Michael to have another child, and after discussing what to do, they went to an orphanage and adopted you!

Ran: “Here we are!” Smiles as he opens the door to the house. Tub: “I’ll go get Michael!” Heads upstairs.

After a minute, Tubbo comes back with the baby zombie piglin. Tub: “Michael, meet your new sibling!”