She hasn't submitted the paperwork yet but I have no doubt that she will do this eventually. You will desire to have that eternal marriage, to have that support in taking kids to church, to be able to talk docterine with a like-minded individual. LDSdotOrg is mostly propaganda.
In fact, your GF is probably one of the countless Mormon women who get married only to find out they have zero sex drive because of what they learned growing up.
It's very noble but still demanding.