Try not to be too mad at Jacek for bringing your brother to the devil as asked to. No offense, but your brother was a serial killer who has no intentions is stopping it seemed and didn’t have any thought for human life. He is honestly getting what he deserves. Though I do understand it’s hard to see family that way and the need to protect them no matter what they have done is always strong . Just remember Jacek was just doing his job and to be honest I don’t think that it’s a job he could back out of or pick and chose who he decides to follow through on when it comes to what he is told to do by the devil himself. Even if he is in love with the jobs sister so try not to hold it against him too hard. Good luck OP and don’t give up on Jacek yet I think there is a lot of unresolved feelings there and potential to make a bad ass couple who compliments each other in a lot of ways and could get a lot done! I looked forward to hearing more!