Just a suggestion, but what about waiting to see if MIL gives you any response to your email? You know women are going to discuss "everything", so more than likely, she'll mention it to your SIL. Unless you think they may share a difference of opinion and you want to head it off.
I was just thinking that it might not look quite so "planned". Just a thought. You know their personalities.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!
