Going back over the logs, the main reason I'm 100% certain Tiny knew Rose was a minor, aside from all the other obvious reasons, is the fact that when she told him she cant fly out because her parents are strict he didn't push back and say "but you're are an adult!". If someone wants an 18+ person to do something and they say their parents won't let them, the first response from 99% of people would be remind them they don't have to listen to their parents. And keep in mind, this nigga was begging and desperate to fly her out. He never encouraged her to make her own choices like an adult would because he knew she was a fucking child.