My husband always had two dogs. Two, so they would never be alone...and they were good buddies.
I would REALLY like to see the death penalty, WITH "cruel and unusual punishment" for people who mistreat ANY animal.
One appropriate punishment: having to listen to Ethel Merman sing "There's NO Business Like Show Business" for an hour. Worse punishment=listening to her longer.
Beyond that, I've got too much stupid in my past and future and am not qualified to judge her, though I appreciate the thought. She might be one where the guilt is more than enough. Stupid can't be fixed, they say, but wisdom most often comes with a high price.
I agree with your husband and think that, social creatures that they are, dogs need other dogs. Personally, I couldn't handle more than two. I think they each need to feel like they belong to someone and someone to them and I'm maxed out at two.