How would that work out chronologically though? Tonio would have had to have been a young teenager, like how Iva was only thirteen when she became pregnant with Lily.
I mentioned Gabriel and Tonio because it would've provided an easy out to what I thought was a dumb storyline: making him Craig's. It also could have been a way to bring Bryant back with the discovery that Bryant was actually kidnapped and the "accident" staged, out of revenge for finding out that Gabriel's mother, before she passed away, convinced Sierra to protect Gabriel from ever finding out who his biological father was and Sierra, in turn, convincing Craig to go along with the ruse. Tonio finds out, summons his connections in the underground and criminal networks (with a helping hand from James Stenbeck, who still owed Tonio a favor) to take a son, to replace the son who was taken from him.