Y/n and Theo have been dating for 2 years now. They understand eachother and are there in eachothers darkest times to help. However their relationship has always been somewhat toxic. Theo is controlling and possessive in every sense of the words and Y/n likes to test his patience. Arguments always escalate into screaming matches of nasty words and smashing ans breaking of whatever Theo has access to. But he would never hurt her. And would ways protect her from anyone else giving death glares to first years who even dare to look at her. They never apologise. Both have gone through awful things in their lives for make them this way. Theo's mother passed away from a young age and he has always turned to smoking or drinking since to cope. And y/ns parents are the most feared death eaters and she has never been in a healthy home with any ounce of love.