You said — “Tradition says that Mary was 15. What does that make God?”
Oh..., you’re talking about the Mormon god..., that’s the one that had sex with Mary (in their false religion)...
Now, if you’re talking about Christianity (the God of Abraham, Isaac and Jacob) of historic, foundational and basic doctrines — then “no” — God didn’t have sex with Mary...
Are you from a Mormon background? That would explain your misunderstanding... LOL
Show me a Bible verse that says that sex didn't take place and give me a reason why God couldn't do whatever He wants.