Eh, they're old and have probably been together for a long while. If it works for them and the man forgives her and trusts her when she says she's sorry and realized her mistake, oh well. It's between them now.
Fucked up but I guess that's true. Still, I don't understand it. I feel like even if raised something with the explicit intent of eating it, I'd get attached and pussy out and just love my new BFF.