Darning needle + Strong thread = Tighter pussy.
Replies 3

Well thanks for being a dick. Yeah I am going to sew up my wives vagina. Asshole.

There is a medical version of this--tightens everything up.
Surgery will involve internal stitches which will take a while to heal and a while before she is not too tender for sex. in addition there is a chance of adhesions which will cause her discomfort and also a chance that the scars from the surgery will cause her discomfort. So it is a big decision.