Samantha Rowle was born into one of the Sacred Twenty-Eight families. And not one of the good ones. Her family members included death eaters and were blood-supremacists.
She met a man named Thomas Harvey. Thomas was a Hufflepuff and in the year above Samantha who was a Slytherin. He showed her around the school and talked before parting ways. They ran into each other several more times during Samantha's first, second and third years. It was towards the end of Samantha's third year that Thomas was muggle-born. She told him outright that he was a mud blood and ran away, and she avoided him for the entirety of her fourth and fifth years. However she found that it pained her to be away from Thomas and when a Yule Ball was announced for her sixth and his last year... she asked Thomas to go with her while apologizing for her actions. He said yes.
The night of the Ball went really well and the pair agreed to go on a date after wards. One date turned into two, then three, then four. Finally the two agreed to dating and they continued to see each other until Samantha graduated. Thomas proposed to Samantha at the end of her graduation. She agreed. Much to the dismay of her family, who were very opposed to the idea. The couple married in August anyways and Samantha became pregnant in October. On July 17th, 1979 Matthew Harvey was born.