Oh welll i was in a hurry when I wrote that and I was just replying but ill give the spoilers from as far as i can remember it's been a while i read this
So yeah whatever the sister said in her last life was true jiho did betray the fl, they did have a good relationship at first but after he wins wars with his modern knowledge he became influential and the duke wanted to off the fl and make him marry the sister cause fl is an illegitimate child and jiho became greedy and went with the plan but funny thing is after the fl dies his schizophrenic ass decides he loves the fl and basically he was the one who turns back time. In this timeline his memories of that timeline comeback during the war(?) i guess and he became more obsessed with her and wanting to possess her but he doesn't really respect her or her wishes, he does what he thinks is best fr her and ignores her i think he even kidnapped her as well. (づ ̄ ³ ̄)づ
The goods have been given. It's like the webtoon about a divorced wife... Kind of forgot the title.. but what I remembered is that the previous husband called the FL, "my wife".
It's the same spoiler as the one given. Previous husband was cold to the FL. Always taking the side of his mother/relatives instead of the FL. The prev hubby also went into wars and didn't have his first night after the wedding with the FL. So FL died, and regressed back. She chose to divorce the prev hubby and choose another one. And the prev hubby's personality changed from what she remembered. Basically doing the opposite from what he did in the past timeline. As it turns out, when the FL died, it was the prev hubby to rewind back the time, and his memories still intact from prev timeline. But the ML is the new hubby now... So kind of like this one.. i just forgot what's the name of the webtoon. But this is a spoiler from that webtoon... XD
https://www.mangago.me/read-manga/my_second_husband_desperate_and_depressed/
I think it's this story.
for awhile now but I've had a feeling jiho actually loved her and all that happen between them was her family's doing