GOOD FOR YOU !! Maybe search the net and find the grossest links you can on lfeas and see if she gets as disturbed as you are over this problem...it's a BIG problem and really shouldn't be taken lightly. They really can kill her dog not to mention the problems fleas cause in other areas....like TAPEWORMS
THIS is a great page to get her started - tell her as long as that poor dog has fleas - SHE HAS WORMS (larvae) in her carpet !
http://www.thepetcenter.com/gen/fleB.html