I love my MIL, but she is not very strong and has arthritis in her hands. When DD was five months old, my MIL fell down with DD after trying to lift her. Thankfully MIL and DD were both okay, but my husband and I agreed it would be best for MIL not to try to pick up DD anymore. My husband gently told my MIL we're happy to have her hold DD while sitting but that she shouldn't pick her up. MIL agreed she wasn't strong enough. Now DD is almost 7 months, and MIL picks her up the second I leave her alone with DD in order to get water, etc. I am really upset that she knows she isn't strong enough to pick up DD, knows it is against my wishes, and tries to pick her up anyway. It is starting to sour my relationship with MIL. I feel like I have to watch her anytime she's with DD. Am I overreacting? What would you do?