Zane was your next-door neighbor

You both had cats who loved to go outside. You had a female cat, and you loved your cat so much while he had a male cat

Soon,you noticed your cat's belly had growing quite large, and you just thought she was getting fat until one day she gave birth to 4 cute little kittens

But little kittens looked a lot like Zane's cat, and you heard your doorbell you went and opened to only find cat supplies in a gift basket with a note saying 'Child support'