This is a straight couple as it is an older period of time so Jeremy (Jessica), Scott (Sapphire or Sophie), Mike (Michelle) and Fritz (Freya?) will have to be female versions or you use Vincent's gender bend Violet.

The girl was born into a wealthy family and, because she was female, had barely any choices in her life. She was late to have the person she will be forced to marry but time soon came in her early teens. One of the most richest families, the Aftons, had come over to present their son, Vincent, to be the one who marries her. 

Instantly, there was something... Off about him but his charming attitude lowered her guard and didn't mind that much as he seemed really good towards her from the day they had together. So it was official... By then it was too late. 

A few maids and butlers of her family's were dead around the place as well as a Master of the house not far away. It was claimed to be an assassin waiting to strike for money or the jewellery (fun fact, i cannot say that without 3 or more tries... random info). 

She and Vincent were forced to stay in the house for protection. Only then he... acted weird. 

He came onto her harshly, making almost threats and torture words as if it was dirty talk. as if it pleased and pleasured him. 

He was like he had two personalities, one being this handsome and gentleman while this other was a careless and sexual beast. He used his good personality to keep her into him as if it was a pleasant curse leading into death but you was curious. 

the rest is up to you!