I agree, she's too busy patting herself on the back for her cunning witty plays to realize that she's made a mistake somewhere along the way.
Plus being that she's been raised to believe only to trust in family she probably never thought of murdering him. She let Tyrion live until of Tywins murder, she finally had a…

Seriously, perhaps Jim doesn't realize the Bolton 's house sigil is the Flayed Man.

Lolol!

But they have already shown how much they ate willing to deviate from the books this season as far as the placement of people in Westeros. So, perhaps Jaimie won't need to be present for Lady Stoneheart to appear.I mean look at where Tyrion & Sansa are. I just hope Sansa doesn't get pregnant. Eeew. That would call…

Lol! Yeah, you never know when the right moment for that one will come up. Life works in mysterious ways, maybe you'll get your day.

Ha! Such a missed opportunity!

Seriously hilarious, thanks!

Book Spoiler in my comment! Plus show theories.