This might be a dumb question but...

Christina • My husband & I got married Oct 2016. Baby boy Nov 15 2018 😍

Do babies not like being around heavy smokers? Do they not like the smell? My MIL is a heavy smoker, only smoker my son has been around & he’s made it very clear he doesn’t like something about her. He’s almost 4mos. She never smokes anywhere near him but I’m wondering if he can still smell it via clothing/breath/skin?