Biology or not, these two have a lot more in common than even they know. From real life experiences to personal traits *coughSassyLittleShitscough* to even the littlest facial expressions. They are mother in son in every way.
The mummified heart is said to be that of vampire Auguste Delagrance, responsible for the deaths of more than forty people back in the 1900, a period of vampirism in the USA. When he was identified, Delagrance was hunted down by a Romano Catholic priest and a Voodoo Hougan, and was destroyed in 1912. (x)