Mandy x Irwin. As a kid, Mandy wouldn't accept Irwin. But as an adult wanting to rule the rule, she'll have very few people she can trust. She'll need a loyal right-hand, but also a decently powerful one, like say...someone with mummy/vampire powers? And as an adult, she'd probably be more open to the idea of Irwin, who would do anything for her.
They would have a daughter named Cleo (a ruler and Egyptian) who would admire her mother and emulate her serious strength. She would love her mother, but because Mandy wouldn't smile, Cleo would express joy to her mother without smiling because she fears that her mother would think less of her for smiling (Mandy wouldn't, but she won't complain about less smiles in her life either). Irwin, on the other hand, would be the most loving and warm father. Because of that, Irwin is the only person Cleo smiles at.
Maturity would change Mandy just enough for her to have zero tolerance to anyone other than her dominating Irwin (which he would LOVE) and she and Irwin would ESPECIALLY be hostile towards those who crosses her daughter if her daughter can't handle it herself.
A daughter of a mummy/vampire and ESPECIALLY a daughter of Mandy is tough enough and scary enough to handle most problems. If she's in over her head, her parents will stand at the ready for their little, dark angel.