Requirements:
Buffy and Giles live in England
Dawn and Xander are involved but are trying to keep it a secret but everyone finds out
Someone tries to bake them a cake from scratch and decorate it (this is not easy)
Giles and Buffy try to be alone
Giles' parents are there (they are nice people)
Buffy decides to take up a hobby
Giles in a kilt
Buffy driving in England with passengers
They have kids

Options:
Buffy either didn't die or was brought back and recovered with Giles' help
Season 6 & 7 didn't happen
The Hellmouth was closed