That's her little way of telling you you're adopted.
SUPRISE!
Polo's mum: Polo, I want you... bad
Polo: coo
Polo's mum: Polo, I'm not really your mother
Polo: forizzle?
Polo's mum: foshizzle
Polo: damn, thot i wuz gunna get some real action 2nite
Polo's mum: uh, ok, i'm ur mama
Polo: now we're talking