As this is Laoghaire and not Jenny (for some notable reasons) we’re talking about, she reacted by accusing Brianna of being a witch and locking her in a bedroom.
Fortunately, before all of this happened, she learned that Laoghaire’s home was quite close to Lallybroch, and young Joan freed Bree to take her to Ian Murray there.
Everything was going swimmingly with Bree, Laoghaire, and Laoghaire’s daughter Joan until Laoghaire discovered that Brianna’s father was the man who abandoned her for Claire, traveled across the sea, and is currently failing to pay the alimony he owes.