An Ex of mine had 4 kids and was in her late 40s when i met her. Wasnt the type to be interested in keeping fit, let alone kegels lol. White, Brunette, dark skinned olive type complection, Size 10 with mid sized tits which ok werent exactly firm but not proper floppers, curvy ish arse, pair of big ol flaps but a pussy like a mouse's ear. No matter how wet i got her (she was able to squirt too, and a LOT) even with juice dribbling down the crack ofnher arse she was tight.
After splitting with her, went home from the pub one night with a woman only a few years older and was like a wizards sleeve in every sense, as was an ex i was seeing for a few months who at the time was in her early 30s.
Therefore Id say its just different from one woman to another.