Piratelvr1121, nothing like someone laughing at you to take away your authority.
Tell me about it. When DH got out of the USMC, we moved back east to be near family and as we didn't have a place lined up to move into and he didn't have a job yet, we lived with my folks for about 2 months. He thankfully found a job quickly but those two months were extremely unpleasant and reminded me very quickly why we never got along.
It was two months full of being undermined!
Me: Come on boys, it's time for bed
Mom: Really? It's only 8:30! That's so early!!
Me: It's their bedtime, they need their sleep.
Mom: But where do they have to go tomorrow? They can sleep in!
Me: But they WON'T! You could put them to bed at midnight and they'd STILL wake at 6!
Mom: But we want to spend some more time with them!
Me: You live with them, you see them every day. It's bedtime. NOW.
Honestly I still have a hard time getting them to take me seriously.