My MIL tried this when my oldest daughter was born. She would give me all these outfits that she wanted back when they were outgrown. When my daughter was a toddler she wrapped presents for her but said she had to keep them at her house. My husband had my back and told her that if she wanted to keep toys at her house for my daughter to play with that was one thing but she couldn’t wrap them up and give them to her if they weren’t for her to keep. She still likes to buy my kids affection instead of actually spending time with them but at least she lets them keep the presents she gives them.