Interesting question the title raises.
Do Catholics profess that we are marred in the Kingdom?
Interesting point. I didn't read the title that way but it could be interpreted to mean just that.
I don't believe so. I think the teaching goes something like this: Marriage is an institution and a sacrament that has one primary purpose: children. Since the primary purpose and the secondary purposes are satisfied or no longer necessary in heaven, marriage is no longer necessary.
It's been a while since I looked in to this so I may be wrong. If any other RC has additional info, I'd be happy to correct my errors.