my female cat had 7 kittens the first one born at 1045 last at 1217 she cleans them but she h?

She is an inside cat she got out one time in December and got pregnant she needed help popping sacks on last 3 kittens and cutting imbilical cords on them two she cleans them and feeds them. She had them in are hall closet at the bottom so we took a box and put a towel and blanket in it there is not urine or feces on the blanket from the kittens so she must be cleaning them we have 4 other cats in all 3female cats and one male that we keep away from her h has a appt for neutering next week he is not the dad because he was not around her when she was in heat. but she will walk out of the closet cuddle with are dog then want petted meow then go back for a couple minutes then do it again we just leave the door cracked help is this normal. The we called vet he said when she was in the box she may of felt confined so we put her blankets on floor in clostes

also she has 6 nipples and 7 kittens on her blanket is cat food