In-laws

So this is my first baby and every time he’s with my MIL she insist on giving him food such as fries, ice cream, beans, cookies etc... even going as far and giving him sweet tea and other drinks. I don’t allow him to eat them bc he has 0 teeth and I’m only giving him baby food and his formula/water at the moment. I’ve told them multiple times not to give it to him or that I don’t want him having it and they argue with me saying he needs to try it and needs to be eating it because their other grandchild is 3 months older and has been eating regular food since 5 months. Is anyone else having trouble with this, I feel like they constantly are judging me for not doing certain things with my son. They gave him a piece of beef jerky to suck on today.

*EDIT* for those commenting why I leave my son alone with them. I DONT. my son goes everywhere I go, I commented on this post yesterday saying they still do it while I’m around even doing it while he’s in MY arms.