i think the funniest way spuffsilla could happen is in post-canon, spuffy is together, and drusilla just like. shows up on their doorstep. and they take her in bc she promises to be good and not kill or terrorize anyone and idk maybe she’s hurt or something too.
and buffy’s in the weirdest limbo of her life. she knows that spike loves her more than anything in the world. but he’s also falling into old habits with dru and so a part of buffy is like “fuck, is he regressing? are we done?”
and spike knows buffy’s not comfortable and is trying to make it better. but he can’t not take care of dru, it’s what he did for a century. so he’s just floundering about trying to make everyone happy.
meanwhile, dru is delighted to be hanging out with william and his sunshine. they’re like a family! she’s not quite sure why the slayer won’t cuddle with her or why she still treats her like a threat, or why her william acts like he’s expecting everything to crash down, but she figures they’re both just being silly and makes herself at home anyway.
then one night spike is called away and dru takes her chance to strike. when he comes back, dru is fully on buffy’s lap, arms wrapped around her, purring loud enough to wake the neighbors. smiling big and sweet like the cat who got the canary. and buffy is absolutely covered in red lipstick stains and hickeys.
later on spike asks buffy what the hell happened and she has to be like “from the bottom of my heart idk. but i think there’s three of us in this relationship now.”
