This is more of a relationship question than a pet problem.
I think the real question is- if she treats her pets that she loves this poorly... Would you trust her to have your children in the future? Just saying!
As far as the dogs go- tell her she needs to put them in "doggy daycare" and that they both need to sleep in crates (somewhere where you can't hear them).
I think that the destructive behavior has a lot to do with the fact that the house is a new surrounding, sans 14 other dogs and numerous cats. Think about it- two children who are used to being in a house with 14 other kids are going to be really bored when 14 of their playmates disappear. Give the dogs something else to do, other than be destructive- or make her crate the other dog.
Good luck!