Your father was Donatello, he was your biological father, you were only ten months old, and you were crawling around the den having fun, before Donnie picked you up, sitting down on the couch, held you with one hand as he began to put cream on your soft shell to cool and protect it from germs and bacteria, but when you felt the coolness you began to scream and wriggle, you didn't like the feeling of that cream at all, Donnie growled annoyed, covered his mouth with his elbow and screamed scaring you, you stood still and silent shocked by that gesture while Donnie spread the cream on your shell without any problem