Some young people want what they want when they want it. They could come from a good loving family who only want to protect them from themselves but it's not enough if their hormones have obsessed or been encouraged to obsess for an older love interest.
I saw this happening somewhat like Regency to modern day. I expect that he thought he could convince Tony to hide him until he was of age and I expect that Tony would. How often does a young willing rich dumpling fall into the hand of an unscrupulous older person after all, for the money and the sex.