What does he mean by this?

I have a close cousin who is a single mom and her child is my godchild. I was telling my male family friend that my godchild is my child and I will take her and take care of her like she is my own child and he first said “you mean our child” then he proceeded to say that “ we will remove your cousin from the equation and we (me and this male friend ) will raise the child all to ourselves and the next time my cousin sees her the child will not remember her mom with the laughing emoji” lol

What does he mean by this?
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