AITA For refusing to hand kids dinner plate?

I moved south so my husband can be close to his family and the cost of living is cheaper. I WFH and he works full time as well. Occasionally the older kids (15-21) will come over and stay. When I cook I will let then know the food is ready and to come and eat. I let them fix their plate and decide what and how much they want. My husband said I should be fixing their plate and bringing it to them. I said no, I don't mind fixing the plate, but I'm not gonna serve dinner to their room or living room, they can get up and come get their food. Beside we have a no eating in the bedroom rule anyway. He said "they are kids, that's how things are done in the south." My response was that they are not little kids or guests and they are old enough to fix their plate or come and get their food. I will fix and bring his plate cause he works and pays the bills. I have an older son in his 20s and since he was a teen I stopped fixing his plate and let him decide what or how much he wanted to eat. He didn't talk to me the rest of the day. The issue is over with and we discussed and I agreed that I have no problem making dinner plates, but I'm not a waitress. It has been on my mind if I'm right or wrong. AITA?