I am just a tad confused. The line says "Most would say I owe you." Why would the mother owe the child? Wouldn't that be "most would say you owe me?"
If you meant it that way, I totally understand. No worries. I think the poem is lovely. I remember my mother had that belief that I owed her for my life and I hated that. I would never feel that way with my own children and this poem sums it up nicely.