I also think a big part of this for her is that she romanticises her life in the US: before her husband, before kids, an 80s/90s childhood nostalgia as someone who had only ever known their town, which would be soooo different from uprooting her London kids and putting them in a situation where not only is everything new, they would very clearly stand out as different. What she wants for them in this proposed move doesn’t exist.