Sorry I don't have any advice.
Our boys are 5 and 3 and we have just reached the age where we are "offically" homeschooling. I have a feeling I will be in your shoes soon with my MIL. I have not even mentioned unschooling as she has no idea what the word means and will probably freak when I do explain it.
My only hope is she dose think DH and I are thoughtful people, and trusts us. Maybe if she can trust me, she can let go and trust our homeschooling ideas.
That said I think, once a mother...always a mother. If you are confident in your decisions (in front of family anyway. Save your homeschool concerns/worries for other HSers who will understand) it will be easier for her to trust your decisions.
Hopefully others will have some good advice!

Our boys are 5 and 3 and we have just reached the age where we are "offically" homeschooling. I have a feeling I will be in your shoes soon with my MIL. I have not even mentioned unschooling as she has no idea what the word means and will probably freak when I do explain it.
My only hope is she dose think DH and I are thoughtful people, and trusts us. Maybe if she can trust me, she can let go and trust our homeschooling ideas.
That said I think, once a mother...always a mother. If you are confident in your decisions (in front of family anyway. Save your homeschool concerns/worries for other HSers who will understand) it will be easier for her to trust your decisions.
Hopefully others will have some good advice!