The killer is in fact Malva's brother, Allan Christie (Alexander Vlahos). He is also the father of her baby, having raped and abused Malva since she was a child. Malva had decided to tell the truth, which is why Allan killed her.
Later, after Claire has returned to the Ridge, she is confessor to Allan Christie, who explains that he was the one that fathered Malva's child, and then murdered her.
As readers of Diana Gabaldon's books know, Jamie is not the father of the baby and it was all a ploy on Malva's part to hide the identity of the baby's real father. Malva was also sleeping with a number of other men on Fraser's Ridge to deflect attention from the real father of the child.
Jamie denies having slept with her, but the damage to his and to Claire's reputation is done—and the bond between the Frasers and Malva is severed, until just a few weeks later, when Claire finds Malva murdered in the garden.
Claire is arrested for murder, but Tom learns the truth in the end. It was Allan who did it. It turns out Allan sexually abused and raped Malva, and he is the father of the child.
Malva Christie might have only been introduced in Outlander Season 6, but she has a central role in the drama. The daughter of Tom Christie, she is both naive and sinister, and many Outlander fans have struggled to work out her true intentions.
Claire eventually realizes that Malva is lying because she knows her husband well enough. Tom seems to question Malva's story. You can see it in his face that he's trying to figure out if this story is true. And then there are the reactions at the funeral when Allan refuses to let Claire carry the baby's coffin out.
Claire knows that she didn't have the same thing, but she can't get to the bottom of the cause. It's Tom who eventually finds out. Malva, before her death, tells him that she made them sick. She'd collected parts of the dead Sin Eater and poisoned Claire and Tom.
The haircutting was part of the process. Malva wanted to make Claire undesirable. She wanted to make Jamie turn to her instead of to his wife. We can get a sense of that from the way Claire worried about Jamie seeing her with the short, jagged hair.
In the TV series, we get to see how Malva knows all about Jamie's scars. She spies on Claire and Jamie when they're in the barn, which is going to lead to all of his scars on show. The TV show gave us this scene so that it would clear up questions later on.
When Jamie's negotiations with the governor for Claire's freedom fail, Tom Christie confesses to Malva's murder. In November 1776, Allan comes to Malva's grave and confesses to Claire about raping his sister, that he was the father of Malva's child, and that he killed her because she was going to tell the truth.
Jamie also has two stepdaughters, Marsali MacKimmie Fraser and Joan MacKimmie, from his marriage to his second wife, Laoghaire MacKenzie.
You may be looking for the Season Two episode. Faith Fraser was Claire and Jamie's stillborn first child. She was born in Paris, France, following a dangerous pregnancy. Mother Hildegarde had her buried in the cemetery at L'Hôpital des Anges.
Why was Malva watching Claire and Jamie? She wanted to make sure Claire knew the truth, but Claire didn't let her into the house. Instead, her attacker—likely the real father of her baby—turned up and killed her before she could say anything to Claire.
She's never seemed curious about the intimacies of a couple before. This suggests that she's up to something. Watching the two gives her information to use in the future.
This is dysentery. Claire tells everyone that a contaminated water source most likely caused it, but after funeral upon funeral — the body count is high! — no one can seem to figure it out. And then Claire falls ill.
Jamie doesn't really help matters by choosing this moment to confess that he has cheated – but not with Malva. Instead, he spent one night with someone else before going to prison, long ago (and when separated from Claire by 200 years).
At the end of episode 7, Claire is arrested for Malva's murder, with many of the accusing residents citing jealousy or witchcraft as her motives, while the fact the young woman's body was found in Claire's garden didn't help her case.
The killer is in fact Malva's brother, Allan Christie (Alexander Vlahos). He is also the father of her baby, having raped and abused Malva since she was a child. Malva had decided to tell the truth, which is why Allan killed her.
Allan's father Tom later took the fall and falsely confessed to killing Malva in the hopes of ending Claire's trial.
The simple answer is no. Claire and Jamie don't have any more children after Brianna. Claire heads through the stones while pregnant with Brianna at the end of the second season/book. She spends 20 years in the 20th century, and she and Frank don't have any children together.
Is Jamie's dad John Dutton's brother? 'Yellowstone' Fact No. Kevin Costner's John Dutton has four kids (including the late Lee Dutton and adopted Jamie Dutton) but in real life he has seven children from three relations.
In early 1779, pregnant Marsali, Fergus and their daughters Joan and Félicité settle in Wilmington. Their eldest son, Germain, returns to Fraser's Ridge with his grandparents, Jamie and Claire, as Fergus and Marsali think that it is dangerous for a boy Germain's age to live in a large city in time of war.
In the TV show, it's pretty clear that Fergus and Marsali don't know that Claire is a time traveler. At least, by Outlander Season 5, Marsali doesn't know.