Oops, I Summoned a Hellhound And My Ex Regrets

A typo in my Christmas letter to "Santa" accidentally summons Satan, who gifts me the ultimate devoted pet: a Cerberus Hellhound! Tired of being the financial doormat for my arrogant, cheating feline-shifter ex and my spoiled sister, I cut them off completely. My new "puppy" transforms into a fiercely protective, incredibly hot Alpha who is lethally possessive of me. While my ex spirals into miserable regret, my Hellhound shows me what it truly means to be worshipped.