Here's what I remember:
- Blaine and Kurt were trying to have babies.
- Burt and Carole were their owners.
- At some point Puck and Quinn told them that babies were the product of love and that Blaine and Kurt couldn't have babies because dogs and cats couldn't love each other.
I really hope someone recognizes this fic! I'm starting to think I may have imagined it's entire existence! Also, this is my first time posting, so I'm not sure if I got the tags right?