Thank you for pointing this out. Consider also the evolving perspective of the potential husband.
I completely agree, but I think the critical part is that he needs to talk to her. Especially if they're devote enough to expect you to marry in heaven, huge implications with that one.
I was definitely taking the "Tough love" approach because I've read countless times on this and other boards, how Mormons claimed that they were cool with their SO not being Mormon, and that they weren't, themselves, orthodox.