Then you brainwash her as well. Its quite simple.
My wife was a Saints STH, until she moved away to college in Liverpool.
We met up there, and ultimately ended up settling down in her part of the world. Our boys are Albion STH's and she is an Albion fan.
Apart from Joe Hart, Gareth Barry, Joleon Lescott, James Milner, Micah Richards, Paul Scholes, Danny Wellbeck, Chris Smalling, Phil Jones, Rio Ferdinand, Michael Carrick, Wayne Rooney and Ashley Young, you mean?