Okay, basically this seems like a sort of obvious premise but I can't remember if I've seen it or not. I'm looking for fics where Spike and Buffy Claim each other whilst under Willow's spell and then have to deal with the consequences-namely their now being joined-once the spell is lifted.

While you're all thinking about it, if you come up with a Claimed whilst under a different spell fic, I'd like to see that too.

These fics may be what you're looking for - all a good read regardless.

Something Blue-ish by Lenore
Rated: PG-13
Summary: Challenge # 274 on the Bloodshedverse. "In Season 4's episode "Something Blue" Willow's spell works on Buffy but not on Spike write us a fic of Buffy chasing around a terrified Spike demanding he marry her. To the point that she claims him only seconds before the spell ends :P
http://dark-solace.org/elysian/viewstory.php?sid=1773

Something Unexpected by katelyn_d_89
Rated: R
Summary: Set during Something Blue. When Spike decides to make his relationship with Buffy a little more permanent than marriage, huge consequences arise. What will happen to Spike and Buffy's lives once the decision is made?
http://dark-solace.org/elysian/viewstory.php?sid=2408

Somethings by Ashlee
Rated: NC-17
Summary: It's never a good idea to claim a Slayer when under the influence...
http://dark-solace.org/elysian/viewstory.php?sid=216

Wicked by Holly
Rated: NC-17
Summary: Buffy's choice of Halloween costume might have been whimsical, but she wasn't quite prepared for it to be life-changing.
http://dark-solace.org/elysian/viewstory.php?sid=2727

My "Just a Little Spell" (or you can find it on here or the Bloodshedverse.

Thanks-you all rock. That's a veritable feast of "oops" claim fics.

Please don't use url tags when posting links. They make the link NOT work. Just post the link and the forum will make it work all on its own. Thanks.

If your interested there's Beloved in blood by Ameeya
http://dark-solace.org/elysian/viewstory.php?sid=56&warning=NC-17.

Kinda along the same line. However instead of being under a spell he's under the influence of alcohol. Spike claims Buffy while he's drunk so he doesn't remember doing it.. I highly recommend this story.

Actually the url tags does work but you have to put some text between the tags, something to link.

annamonks - the best revenge is a current "something blue" leads to claiming. It is well written & a good read, so far....