Whyen you said she washes it every week because of the pets the bell should have gone off. A couple of years ago I purchased a kingsize pieced top from a vendor at a quilt show and had it machine quilted by a friend who is a great longarmer. I am a died in the wool handquilter but my step-daughter who was to recieve the quilt as an anniversary present is a nurse. I know that she washes all of her bedding, quilt included every week. I maybe wash my quilts several times a year and then always use the "gentle" cycle. I don't know what happened to the quilt I gave her. When I managed to get a peak in her master bedroom she had redecorated and totally changed the color scheme. For all I know the quilt is protecting the lawnmower in her garage.
I think that no quilt batting will stand up to abuse.