Think again Wilf.
If your girls end up marrying locals, then you will have to work extremely hard to keep the Saints gene prominebt/dominant. I had this last year with one Grandson who had moved away. Told me on the phone that he was changing to Chelsea, 'cos most of his classmates supported them! We had a long talk about the rights and wrongs of gloryhunting, loyalty and life in general. He now wears his Saints shirt proudly and tells them proudly 'I support The Saints'
When the time comes,get in early mate, and treat them to lots and lots of weekends away (St Mary's). Incidentally, his first game was against Bayern Munich! Lucky lad, mine was probably Gillingham Vs.
S****horpe, although I was treated to 7-2 spectacle, which cemented my love of the game from the start.