Sounds like he tore a part of your couchie...
tears can and do happen, especially with all these extreme dildos about.
My immediate ex g/f had quite a tight fanny, like you got immensely wet all of the time. I was the 2nd biggest she'd had (her immediate ex was huge apparently) but you wouldn't have known as the elasticity had returned.
My ex wife, 2 kids dropped naturally, was exceedingly tight before (lots of sports etc) and after the birth was a little looser, but not so much you'd notice.
Everyone is different...some women can orgasm with a man inside, some can't, some need manual stimulation, some can't.full stop. some needs a certain position. I wouldn't worry too much darling....
Just get on with having some decent jiggy.....after all, when you're 6 feet under, you ain't going to be on anyone's christmas card list !