I really hate my mother in law. She gets jealous easily. She made such a big fuss and cried when my hubby gave me a gift for wedding anniversary. My hubby is at his wits end. We bring my in laws out regularly and buy things for her occasionally too. How do I tell her to grow up?

I think taking any passive aggressive behaviour might do more harm than good. The best way to deal with this is probably to take a higher ground approach. Give VERY clear hints that boundaries are there for a reason. Mother in laws are creatures of habit too, just need to find a way to break her out of that habit. Find her a hobby maybe?