I've just finished the Slayers quest above, and here's what i did, you need to first accept the Elusive Husband quest in the village board of swamp village, then go to tajari? The girl with big bobas at the east, talk to her then go back to the entrance of the swamp the go east near the swamp entrance go to north of that area, there you can see a pole click that it will reveal that there's a rope tied in it, pull it then it will reveal a boat, there go to another area using that boat, after that you will find the husband doing some things to other younger woman, in there you will need to talk to the husband you have 2 choices there either accept the necklace or not if you reject it he will offer you another choices, either you get to have your way with the one he's just using or not if you reject it and report it to his wife you can have a way with his wife but you will not be able to have a way with the other girl. But if you accept and report it to his wife you can have a way with the young woman but you can't have a way with his wife