Do you have any idea of the dangers outside for an adult cat let alone a kitten? Get those babies to a NO-KILL Shelter or back inside before another cat, dog, raccoon or something else kills them or they get hit by a car or something. They are way to young to be outside and shouldn't be outside anyway no matter what their age. Also mom sounds very stressed or very ill. She needs to get to a vet A.S.A.P. before something serious happens to her. You also should think about getting her spayed. With every heat and with every litter you are potentially shortening her lifespan and chances of getting certain cancers. Some vets will work out payment plans call around until you find one that will.