No. He is only reimbursing you for expenses.
The question you didn't ask (maybe because you already know the answer) is: Does this expense count as eligible room & board for the 529 plan income exclusion? The answer is yes. But not the amount he actual pays you. You may exclude your actual cost or the school's aid allowance, whichever is less. You may need to check with your child’s school to learn the room and board allowance for students living at home with parents. It’s likely to be less than off-campus students living independently, but should still be in excess of $1,000 per school year.
No. He is only reimbursing you for expenses.
The question you didn't ask (maybe because you already know the answer) is: Does this expense count as eligible room & board for the 529 plan income exclusion? The answer is yes. But not the amount he actual pays you. You may exclude your actual cost or the school's aid allowance, whichever is less. You may need to check with your child’s school to learn the room and board allowance for students living at home with parents. It’s likely to be less than off-campus students living independently, but should still be in excess of $1,000 per school year.