M4F Bitch MIL gets punished

My wife’s mother in law got divorced and moved in with us. No one wanted to take her in since she’s unbearable. My wife goes on a work trip leaving us alone. She keeps complaining and lazing around doing nothing. One day I catch her going through my stuff trying to steal things and decide to punish her since she’s willing to do anything to keep this between us.

MUST BE 18+ PREFER 21+