Spoiler (TRIGGER WARNING)

Yes
Her ex is in that hospital(?) he's alive, but remains unconscious majority of the time due to narcotics(drugs? The one that involves smokes). Given food just enough that he survives.
Yes, her husband has something to do with it
No, was his brother's wants to run away from the marriage. No manipulation was involved
Yes, he did take advantage of brother asking for help in running away.

Why did he do this? To punish brother from doing wifey dirty and shaming her.

But hubby isn't any saint either.

Major spoiler:

She is pregnant. She tries to hide but hubby is too perceptive so he knew right away. She continues to find what hubby is hiding. She discovers that ex is there. Hubby misunderstands that she still likes ex because she has this abortion powder in her closet she can use when she wants to escape (take note, she loves him but she doesn't trust him enough because he's too secretive) while trying to find what happened to ex.

As much as he didn't want things to be like this, afraid she'll abort the baby, this made him lock her up with chains, like a bird in a cage. He never hurts her, but she hurts herself. She doesn't eat and tries to escape. Going to the climax is when ex runs away from the hospital while she does her escape. She asks hubby to give ex a day until he could hunt ex or else she'll jump. Hubby gives in.

But because she did that, she was even more... Caged. To the point that she is kept drugged like her ex so she won't do anything to escape or hurt the baby. Queue hubby seeing her commit suicide twice, also him saving her. He realizes he can't do anything and nothing will change. It's just gonna be a cycle of that, so in the end, he lets go.

How? Well first no drugs anymore, no very high surveillance security. She knew he was letting go because while there was food served for her, that abortion powder is also on the side. He left her all his property if he goes missing, and gave her the power to annul their marriage. He tried to find her ex/his brother but failed

But you know where this goes. She first finds ex (surprisingly easy). She almost died from getting targeted by ex. But she beats him up, and discovers he'll burn everything as revenge. Now she goes finding hubby. She had a bit of a hard time finding him and when she did.. well he's the one committing suicide. Bro was in shambles bc he thinks couldn't even be a replacement for her ex and that he did all of those things that hurt her so he doesn't deserve to live. Queue fl finding him, stopping the attempt. They talked, bro got enlightened that the reason she stopped him from killing ex is bc she didn't want hubby to kill, not because she didn't want ex to be killed. And they talked more and knew the feelings were mutual. The end. Im bad at this ik

He's a freak though. I didn't finish it yet but... Bro is willing to suck her pussy with his brother's cum in her just so she doesn't have any other stuff in her... bro... Bro did this WHEN HE'S STILL YOUNG TOO?? I WAS SO DAMN TURNED OFF WITH THAT BRO