TMI! Too tight? Help!

Ok so my husband and I have two kids together and I am pregnant with my third. Ever since I can remember I have always been super tight down there. I don't really do kegels and no matter how turned on I am I am still really tight. I am blessed because I hear a lot of women complaining about being too loose but sometimes it can be hard because it makes it hard for my husband to last long. He says it is too tight for him to last long and this has happened with old exboyfriends as well. This might be tmi but he describes it as like a vacuum like suction that just sucks all the cum out.We have to have sex two times before he can last long. He hates cumming fast and said he never had this problem with his exs, he wants to last long to please me. Sometimes he ends up holding on but lately I've gotten tighter. This is a serious question any help is appreciated:)