Linnae13Hi,
It really is excellent 'Blood of My Blood by Blood Faerie'
Funny too - especially 'Tarzan' and although I am very much like you and want an ending, I still think it is worth reading, however saying that I've read it twice and am always disappointed that it didn't get finished because I'm desperate for more.
Still I love it though,
Mel
Even though this may not be exactly what you are after I have to mention one of my most favorite stories which is Crave by Nautibitz
Summary: Devilish billionaire Spike Pratt is accustomed to getting what he wants -- and what he wants is his beguiling, headstrong new daughter-in-law. Buffy refuses to give in to his relentless advances -- at first. As she learns about the amazing man behind the armor, she can't help but shed her own... But what will happen when she finally digs up his family's buried secrets -- and when her husband discovers hers?
http://nautific.livejournal.com/15682.htmlYou have most likely read it seeing as we seem to have very similar taste in stories, but thought I would mention it anyway. Anyone seeing this who hasn't read it, Trust me it is phenomenal. One of the best stories around - very smutty though.

Oh I must mention it isn't finished either, but leaves off at a part where you can still be happy with the story. Hopefully she is still going to finish it
Beloved in Blood by Ameeya
Summary: Spike returns to Sunnydale to kill the Slayer. He's just too drunk to do it properly, and ends up getting himself into the deep without even realizing it. Perhaps worst of all, he has no memory of his actions the next day.
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=19628