I thought it was too pastel for you, so it's okay if it goes back! I am sure you can find a much better one

Are you kidding???? This is as fab as a dress can be! I'll be sorry if you'll return...but alas...what to do if He doesn't like it?:-(

Ah, then it makes sense...nobody wants to look like MIL indeed...
If sounds like you don't LOVE this dress anyway so no broken heart...:-)
I am sure there is a better dress out there for your which your MIL have not even seen!:-)