Some of my recs would just duplicate from your earlier thread...
https://www.spikeluver.com/Forum/index.php?action=vthread&forum=5&topic=5474You could try these too where they are away for a reason, rather than running away from SD, and get a good break together to get all domestic...
Offers you Can't Refuse by sweetprincipale
Late S.3 AU. Buffy's only way to stay alive and expose a plot by a deranged Quentin Travers involves staying out of Sunnydale and staying one step ahead while Giles finds a way to save her life and get the evidence to stop the corrupt Head of the Council. But who watches the Slayer's back when she's the prey? Someone makes Spike an offer he can't refuse- but not what you'd expect.Promise of Frost by Eurydice
When a snowstorm strands Buffy and Spike, they are forced to turn to each other for strength, especially when a missing Giles, mysterious visitors, and way too much magic threatens to turn it into a not so very merry Christmas.