How can i kill fleas in my house? ?

The solution that lasted the longer for me was to use the flea bombs first then I used a carpet treatment that is a powder you sprinkle on the carpet. Also important to use flea treatment for your Cats just before you do this or the fleas just jump off the cats and hide in your carpets until the flea shampoo wears off. Advantage or Frontline seems to work the best. It is a small tube of liquid that you apply between their shoulder blades and works at least 3 month. If your husband did bring them home you could be lucky and doing all these might cure the problem permanently. Especially if your cats are inside only cats.