Is there lore for Jekyll's parents?
There is! It's not as fleshed out as the other lore in my AU but there is, in fact, lore for Jekyll's parents.
Mairead (anglicized as "Mary" after the Jekyll's moved to London) and Hamish Jekyll marred when Jekyll's mother was fairly young and she wasn't exactly thrilled to be marrying an older man but Hamish was kind, pleasant and above all financially stable and she was well aware she'd have to marry SOMEBODY (she absolutely hated the idea of being a wife but understood that there just weren't options for women in her income bracket to stay single) so she picked a pragmatic option that provided her with security rather than a romantic one. At first she enjoyed married life well enough, Hamish had enough money that they were comfortable and could even afford small luxuries and because he did business working as a solicitor in London he was often away, leaving her to her own devices. This is how she liked him the most, around just enough that his company was enjoyable and then leaving before he started to irk her.
Hamish was religious, tidy, good-natured, and married to his work. He loved being a husband and he could imagine no greater bliss than to come home and find his attractive wife waiting for him with a hot supper that he could eat while he told her all about work. He laughed at his own jokes, never missed church on Sunday and had a sweet tooth. Above all he was very well liked.
And he was boring. Utterly boring. Mairead always found it hard not to hate him just a little when his idea of a perfect outing was to walk around the park after lunch. Mairead herself was always restless, always longing to wander or to seek out some new excitement. When she could arrange it she saw an opera or went to the horse races. She drank a lot, gambled and spent most of her time with her friends.
Then the worst thing happened. Despite being careful and trying to take precautions she fell pregnant.
If Mairead hated the idea of being a wife she hated the idea of being a mother more, worse she hated how much Hamish loved the idea of being a father. And by "being a father" I mean Mairead did most of the labor, the feedings and diaper changes and Hamish got to come home in the evening and play dad for an hour before putting the kid to bed. After giving birth to Henry, Mairead started to deteriorate.
Suddenly Hamish was home every day because he was excited to be a father. Meanwhile, Mairead struggled to adjust. She didn't fully even understand what it was about being a wife and mom she hated so much, only that it felt like she was disappearing and every day she was living a lie trying to pretend she loved motherhood and that she loved this man. This man who's idea of loving anything could be summed up in a dry kiss on the cheek as he left for work. She hated how it made her feel like a villain to be incapable of loving her husband and her child.
After their move to London She got less discreet about her drinking and gambling. She had affairs. Once she was brought home by the police after fighting with another woman and Hamish, rather than address the issue simply tried to cover it up and sweep it under the rug. He wrote it off as a one time lapse in judgement. He chastised her and urged her to think of their son and their reputation but then simply returned to his routine with the expectation that things would fall back into place.
Things did not fall back into place. Mairead grew increasingly frustrated and began having an affair with an artist. Hamish spent a lot of time and money covering that up and destroying the nude paintings of his wife before they could be discovered. He and Mairead began to fight. Henry was old enough by then to realize that all was not well in his household and he buried himself in his studies. Every time he distinguished himself academically or athletically the fighting would stop and his parents would seemingly be united in being proud of him.
Mairead did grow to love her son as he grew older and began to have a personality. She could see he was bright, ambitious and filled with so much potential. It made her hate herself for not being able to be the kind of mother Henry needed. After a particularly nasty event where she lost a large sum of money Hamish finally had to put a stop to her activities. He cut off her access to the family's funds and hired a nurse to watch her and keep her from going out. Mairead vacillated between hysterics and fits of catatonia. Hamish was forced to spend more time at home. Henry retreated even further into his studies. While he was at university his father died of a stroke. His mother improved a bit after his father's death. But Henry couldn't shake the feeling that she hadn't "gotten better," she'd simply given up. She was listless and made only the barest effort to function in her life. Henry watched her fade a way bit by bit until she too died.