So, I really couldn't get the ring playing nice, other than having sex with him. BUT I just got it by threatening and then fighting him. Which is kinda strange.
Viewing post in Bypass Seduction in Heirloom\Wedding Ring Quest
Oh yea, thanks for the reminder "Bugged" is a good word. When fighting the 'evil brother' (forgot his same) I managed to get stuck everytime after the cutscene were we rip through him. I think I could move again if I saved at that point and reloaded that save again. One time I could see the body of him still standing but inside me, which probably caused that bug.
I guess it would work if you'd move his body a bit away, so we're standing next to him, not over him.