Quote Nubien: If Dylan is Jack and Nikki's son that would mean Dylan was adopted. I am sorry but this storyline makes no sense like so many others.
Makes sense to me. After Victor switched the babies, he dumped Dylan in an orphanage/adoption agency where he was adopted by the McAvoys.
Dylan says he's an only child which always struck me as peculiar since Terry McAvoy was obviously a wonderful father and family man, why didn't Terry and his wife have more children and give Dylan some siblings?
Most Irish families I know are huge with lots of brothers and sisters running around.
If the McAvoys were sterile somehow, it makes sense Dylan was adopted.