This all sounds so familiar! I'm constantly going through the same thing with my parents and my MIL. I gave my mom a book on AP. You might try giving them THE DISCIPLINE BOOK by Dr. Sears. Of course, my mom just turned her nose up at the book I gave her. I think she read part of it, but she told my sister behind my back that AP would spoil Gabriel. I, too, am messed up b/c of how my parents raised me and I can totally see that. My brother died at the age of 24 from drug/alcohol addiction and I don't think he ever felt loved/adequate. Yet they still think their way is better. How blind can you be? I've kept my mouth shut though b/c I don't want to hurt their feelings. I know they did the best they could with the info they had at the time.
MOTHERING YOUR NURSING TODDLER said it's best to listen to their advice and then kindly tell them that you understand they are just concerned for you and your child b/c they care about you. It's also good to let them know that you value them and their opinions. But then you can kindly tell them this is what works for you (and you can tell them why if you want). I love to give my parents books or refer to books so they can see I'm doing this based on research, not just b/c I'm lazy
Anyway, I don't really have many answers, but I totally know what your going through. Family is hard to deal with!
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God Bless You-
Beth <><
Wife to my best friend~Adrian
Mama to Gabriel
Christian, Attachment Parenting, Cloth diapering, Whole Food Eating, Extended-breastfeeding, non-vaxing, non-circing, gentle disciplining, loving mama to my "bichito" (little bug); 2-1-02