Mom hits her son

So my family feeds a wild cat everyday. She gets pregnant a lot and we also feed her kittens along with the mom. Some cats leave when they grow up and the cycle repeats. Now a couple days ago, i saw a large cat wandering inside our lawn and it crawled towards me and started rubbing its head against my leg. I quickly recognised the cat. It was one of the kittens that left after growing up and now it was back after almost 7 months. We tried to feed him together with the mother and his new siblings but whenever he tries to eat the mother and her new kittens attack him even though he tries to act friendly with them. It’s really sad, is there a solution?