Schrödinger's marriage

A romantic "partnership" in which a parent is simultaneously married but also a single parent due to their partner's weaponized incompetence.

"Why didn't Becky come out with us tonight?"
"Oh, because she can't trust Chad to "babysit" their kids. Last time he passed out drunk and their toddler microwaved a fork. Nearly burned the house down."
"Gosh, that poor woman - wonder if she realizes she's in Schrödinger's marriage."