He should just be paying child support and she should be feeding his child with that. If he wants to feed his child, he should pick him up and spend time with him and do it. In most cases, it's would be polite to bring food for everyone. However, I feel like she is manipulating the situation to force him into supporting children that aren't his. She had an accompanying tik tok video explaining her position on this. It's probably not the first time he's felt pressure from her to provide beyond his obligations.