Jenny was Clueless About Jamie
I know in the books neither Jenny nor Jamie (which I still find implausible) knew that Laoghaire was the reason Claire was tried as a witch, but still, her entire argument about why she pushed Jamie to marry Laoghaire was full of holes.
Jenny kept emphasizing that if Jamie were married to Laoghaire, he'd stay home, while if married to Claire, he'd leave? Why would she think that? Any previous traveling Jamie & Claire did during their marriage was to France cause Jamie HAD to leave the country. That was on Jamie, not on Claire. And when they returned, before being so rudely interrupted, Jamie told Claire they could farm some land at Lallybrooch, and her only objection was Jenny's newfound hatred of her.
Her other point was that "Jamie's not the kind of man who should sleep alone." WTF? The man was a virgin until 23, married Claire, sent her away, lived in a cave for 7 years & had sex once (which he didn't initiate), then goes to prison, gets paroled, is forced to have sex once and then leaves. How many years was that? 7?
So in 18 years, the man had sex twice, neither of which he initiated. Laoghaire was forced upon him, so in his entire life, the only person he really wanted to have sex with was Claire, showing that he indeed was the kind of man who could sleep alone.