The old historic basis of Wanda's relationship to Magneto was she hated him for convincing her to join the Brotherhood. Pietro did as well, but far less so because he didn't like how humanity treated mutants. After Avengers 503 that basis was shaken up and never quite settled down.
The old historic basis of Lorna's relationship to Magneto was that she derived some measure of her identity by means of her relationship to Magneto all the way back in time to her first M2 code name. For Magneto he wanted a heir, but didn't want to impose it on her.
ToM has shaken up the foundational basis of their relationships at a level that I can't really see what Lorna or Magneto's relationship is with each other. Wanda and Magneto are on great terms and while that makes sense from Magneto's standpoint for Wanda it is a head scratcher. The relationships of all of them need foundations to understanding them.