Sam looked at Rose's bones that his men had brought. They still stank and were wet, there were even traces of blood that hadn't completely dried.
He remembered again when his corpse also experienced the same thing, being used as food for wolves in the forest after being killed and dumped by Rose and Brian.
His grudge against Rose has now paid off, but his grudge against Brian, of course, hasn't completely disappeared. He couldn't describe the pain in his heart over the events in his previous life, all his loyalty to that man was completely ignored and Brian decided to kill him out of jealousy.
The destruction of Brian's J&J Construction company was the beginning of the destruction he hoped for. He would make Brian receive the same vengeance as Rose; death. That was the recompense she wanted to give him.