postpartum sex question

I apologize if this is a little TMI but I am 2 months postpartum and this is my 3rd child. I had her vaginally no tearing or stitches. When I have sex with my husband I feel like it's not as tight as before. I didn't experience this with our first or second child so I'm a little worried that this may not change because it's my 3rd. My husband says he doesn't feel a difference but he may just be saying that so that I won't feel bad. Has anyone experienced this and did it eventually go back to normal or does this happen after having a few children? TIA