If not having sex for many years is there possiblity of tighter vergina

*Vagina

And nope, actually it's the opposite. Sex (unless it's terrible) makes your muscles tense and contract so when you have orgasms and get aroused, this tightens it up! If you're worried, you can always do vaginal exercises - these are especially good after giving birth - and you can do them anywhere. Ever contracted your muscles to stop the flow of pee? Yep, that's flexing your vagina. Work those muscles!