Yep. Definitely some ethical tension there, front and centre when he talks to the Tullys at Riverrun.
“I assume you have returned to fulfill the oaths you swore my niece,” Ser Brynden said. “As I recall, you promised Catelyn her daughters in return for your freedom.” His mouth tightened. “Yet I do not see the girls. Where are they?”
Must he make me say it? “I do not have them.”
“Pity. Do you wish to resume your captivity? Your old cell is still available. We have put fresh rushes on the floor.”
And a nice new pail for me to shit in, I don’t doubt. “That was thoughtful of you, ser, but I fear I must decline. I prefer the comforts of my pavilion.”
“Whilst Catelyn enjoys the comforts of her grave.”
“This defiance serves no purpose, ser. The war is done, and your Young Wolf is dead.”
“Murdered in breach of all the sacred laws of hospitality.”
“Frey’s work, not mine.”
“Call it what you will. It stinks of Tywin Lannister.”
Jaime could not deny that. “My father is dead as well.”
“May the Father judge him justly.”
– Jaime VI, AFFC
“Is there any more that you would care to tell me?” Jaime asked Edmure when the two of them were alone.
“This was my father’s solar,” said Tully. “He ruled the riverlands from here, wisely and well. He liked to sit beside that window. The light was good there, and whenever he looked up from his work he could see the river. When his eyes were tired he would have Cat read to him. Littlefinger and I built a castle out of wooden blocks once, there beside the door. You will never know how sick it makes me to see you in this room, Kingslayer. You will never know how much I despise you.”
– Jaime VII, AFFC
He didn’t return either Stark daughter, he just comes back after his father had Robb and Catelyn murdered at the dinner table, and threatens them to make them turn their very home over as well. What good Jaime’s promises? Just a lot of hot air, from a man with shit for honour.
The Lannister kids: evil, loyal, intelligent, pick two.
(I see Jaime as #1 and #2.)