Would you use your Managers MIL as your cleaning lady?
My manager (not supervisor) lives near by to me. I asked her if she uses a cleaning service or if she is able to recommend one. I told her I am unhappy with the quality of work that my current one is doing.
She told me that she does have a recommendation. That later in the convo she revealed that it is her MIL. My immediate thought was uh uh this is not a good situation for me to be in (using my manger's MIL).
Then my manager said feel free to try her out and if for any reason I am unhappy it is ok that I let her MIL go but that she does such a good job I should not worry at all.