Not really!
Kalyskah is nice to Friar, he will tell her that Boris has buried the ring. You can get the same information from Boris depending on what you talk to him. In this case, if you activate the vampiric vision and go to the tree next to the lake (the same tree the erotic scene happens) you can find it in the ground. Another way to solve it is buying the ring from him.
The ring is by the same tree Kalyskah would have sex with Boris. But it only appears after you talk to Friar being gentle and then talking to Boris and being polite but not going through the path that they have sex. I can't remember on top of my head the exact choices you need to select, but I know talking to Friar is a key thing because he will tell Kalyskah that the ring is burried.
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.
