Issues with Mil

Every weekend we will go to my mil house and spend at least five to six hours there. Everytime we are there, my mil will teach baby some bad habits eg. banging utensils on the table, playing with fruits that others still haven’t eat. Then each time he come back, the next day he will start to do the same at home and I have a hard time correcting him. She let him play everything, even plastic spoon that have sharp edges etc. I really don’t know how to deal with this situation. Then when she has cough or not well, she still want to carry baby. Anyone has similar experiences can help?#firstbaby #1stimemom #advicepls