Although Abigail may not be Damien's actual grandmother, she still treats him like her grandson
This was a request done for me by my friend Stevie, huge thanks to him for drawing this adorable image

Here's a short story to go with the image

Damien slowly stumbled into the living room, his eyes blurry from his unfortunate curse of insomnia. Despite being a daywalker, his vampire instincts caused him to stay up during night and sleep during the day. He plopped onto the couch where a familiar old possum sat as well.
"Ya all right sugar?" the possum asked as she watched Damien plop onto the couch. "Yeah I'm fine granny Abigail" Damien said with a yawn as he began to doze off. Abigail scooted closer to the young mouse. "Here sugar, why don't you rest ya little head on my shoulder?" She offered, which Damien gladly accepted.
"Thank you granny, I love you" Damien responded sleepily as his breathing slowed and evened out. "Ya welcome sugar, I love ya too" Abigail said she laid back and dozed off as well.