need to vent about MIL

My twins are almost 8 months (note; 6 months adjusted, not sitting up yet)

my husband isn’t home much because of working 2 jobs so he really doesn’t know much about making decisions or taking care of the boys that well, he was also just away for the whole month of July for work. His parents only show up about once every 2 months to visit for a day. I don’t leave the boys alone with my husband because he’s not the most nurturing or patient person (I’ve seen it first hand) so it makes me nervous (not that I think he’d hurt them, he just gets frustrated when they’re upset and he can’t figure out why, which then they feed off of his vibes even more and get even more upset) so yeah, but his parents came to visit Sunday so I figured it’d be okay to go run errands since there was 3 adults with the boys & I really needed to go shopping for our vacation soon. Which from what I heard when I returned, it went well. BUT my MIL said “they had chicken, potatoes and green beans!” I was like uhh they never had table food yet..only baby food..I planned to wait until they can sit unassisted..And she said “oh we were giving our boys our food at 6 months, we’d chew it up in our mouths and give it to them. Like little baby birds!” Excuse me? She chewed up food in her mouth and gave it to my kids.... I was not happy. 1. She’s is hardly ever around so why does she think she can make the decision to give my babies food like that without asking 2. Do not chew up food in your mouth and give it to MY babies. I’ve told my husband how I felt about this, & he’s of course siding with his mother. His parents have never really been that involved with us, they just pop up once in a blue moon so I’m not that close with them which may be why I’m reacting the way that I am. So I might be overreacting, but I don’t care...they could have choked, & that’s gross to me because she’s not their mom & that’s not okay to do without asking the parent who is with the babies 24/7.