Same here. My fil will smoke liao and then carry my son when he was only a few months old. My son got pneumonia when he was just 1mth old ok, scare die me! So I am very protective de!! At first I told my hubby to say then he still does it. This happens a few times. The next time I said lo. I said ‘dad, if u dun mind, pls do not carry my son after you smoke ok? Smoking is already vv bad for your health, can u imagine the 2nd hand smoke? Your grandson is so young, respiratory system not as strong as ours, so pls refrain for carrying him ok. Or you can chose to smoke after we leave? Then again, your grandson so cute, wanna u to carry him, aiya, u dun smoke la. Better for u too!’ Then my fil really try not to smoke whenever we come or he refrain from carrying him. It works!! Like you said, I’m the mother, it’s my way or the highway. I will do whatever it takes to protect my children. Now my son has grown up, he will tell his grandpa not to smoke and carrying his meimei. No prize guessing who ‘taught him to say that!!’