I'm not trying to be means here, I'm honestly surprised you haven't heard of a starter wife.

First Wives Club. Goldie Hawn, Diane Keaton, Bette Midler. That came out ages ago.

There's even a concept of a starter husband. Guess how that goes? Young women saw their moms getting left high and dry because dad got bored so they don't emotionally invest in men. They don't marry for a long term partner, they marry for good enough right now, at least the kids will be cute. Figuring they're going to be left eventually anyway, they're always on the lookout for the life partner the truly desire, it just the next best thing.

When someone comments on their relationship they shrug nonchalantly and say, "he's a good starter husband".

Objectification and usury has consequences.