Ryan, I agree with zh on this. I know how very difficult it is, but I am sure they will be taken care of by the shelter mom. Decisions like this are never easy, especially when we are animal lovers and take our pets as family members.
For me, my 2 "girls" (dogs) are my babies, they are a lot of work but kids are too. Giving either one up would devastate me, and if the time comes (I hope never) I do not know what I'd do. I know you are the best "ferret dad", and maybe, just maybe knowing in your mind they'll be okay can help. I'm sure this woman will take them on as her baby.
They are so cute, how can she not.
Try to take care,
Roe

(((((((((((((((( Ryan ))))))))))))))))