Vagina Expanded After Delevering Baby. How To Bring It To Normal?

I have four children. Birth Weight between 3.5 kg to 4.0KG. My vagina just look so open. No discharge. no smell, no itching, no pain. I look down and there is a piece of hard mound of flesh poking out and further down more meaty stuff. Sex is normal. But when put fingers inside, just too meaty. From outside don t look like a normal vagina. It look so open. It does not have the labia cover or the perineum . Clit alright, vulva ok but seems to open up to anus. Is this normal. I m scared that man with a smaller penis might just get loss in there.