How can u tell if u have a tight or loose vagina?

I have 3 kids and all 3 have been vaginal birth's, also my hubby has a thick penis, I don't know if this gets u loose after some time.

I've asked my hubby to tell me the truth about if he feels like I'm loose or not,

He tells me that he can't tell after it gets wet, he says not to worry that it doesn't matter, so I'm assuming if he can't tell if i am or not then I might be.