Sharing utensils or straw wif LO

Do u let ur Lo sharing utensil or straw wif grands? I feel it's disgusting for my LO to share the utensils or straw wif my PIL. Especially my FIL is a heavy smoker. I fear that when my LO share he will somehow contact wif the cigratte smell/nicotine. Sometimes i notice my FIL feed my LO with his unwash finger after smoking. This makes me feel vry disgusting. Ever voice out to my spouse, but nth was done. I hope Pil can take care my boy bcoz im working mother, but yet i cannot control how they look after my LO 😩😩 What shud i do...