Tony loves him just because he is his alternate reality kid. He won't get into anything about his previous time unless he asks.
Torunn loves her brother even if she doesn't say it often. She sees James as more of an equal because they are roughly the same age in canon so she is rougher in her verbal and physical sparring with him than with their little brothers. She won't mention anything about his previous time unless he asks.
I have Lyra now so definitely up for working on extended family things. And Cassie is 14 nearing 15 so they can be friendly too.