They have been modified slightly to work with controlling in-laws. In the following scenario, a mother-in-law is pretending to help her daughter-in-law but is really trying to get her to do things her way.
The daughter feels that what her mother-in-law is implying is that she is not a very good cook.
Although this may seem impossible to achieve, you are about to find out that there is a way to stop the negative behavior without disturbing your standing with your in-law.
When you use this sentence every time she slips, she will become more aware and learn to restrain herself from this type of behavior. The mother-in-law who insulted you in the heat of the moment probably has issues of her own that affect how she feels about you.
She may have insecurity and problems with self-esteem that leave her chronically irritated.
However, she may just as easily have been in a foul mood and was simply taking it out on you.
When you use your sentence with the heat of the moment in-law you will simply be calling her on her rudeness.