Re: how would a clever DIL behave while shes living with the inlaws...
When it comes to in-laws...Ive got a rule for myself: I cant control anything they do or think...just my own actions and reactions.
That being said, your job is to try your best. Do your best regardless of how mean or nasty they are, I hope they arent. Be nice and accomodating. As for being a chatterbox, Ive met very very very nice women who talk A LOT. There is nothing wrong with being lively, its the content that matters. Dont get so carried away in your talking that you start to comment unnecessarily or offend people.
In the end, its better to be safe then sorry. If I were you, I would try not to talk so much and watch what I say.
Good luck!