PlayPussy uses most of the bento bones from the tail, hinds, and crotch for animations and shape control, precisely 15 bento bones. Therefore, any other attachments you're wearing that animate or move any of these bones may result in deforming PlayPussy.
Suggestions / Solutions
Step 1) Remove all your attachments except your mesh body and PlayPussy.
Step 2) Add your attachments 1 by 1 while observing PlayPussy, to find out which one is causing the issue.
Note:- AO from certain brands is known to distort Bento Vagina.