More than just kisses under the mistletoe:

The Seduction Season by Helen Bianchin
Instead of a Christmas break lazing in the Queensland sun, it seems Anique's aunt has arranged for her to spend her holiday preparing meals for an infuriating, sexy Frenchman. So Anique cooks up her revenge with glee, never guessing that Sebastian will end up appointing himself her unofficial bodyguard, and a romance neither expected blossoms -- just in time for Christmas.

Miracle on Christmas Eve by Sandra Marton
On the anniversary of Nick's divorce from Holly, he's taken a sentimental journey to spend Christmas in the hideaway where he and she honeymooned. Holly, wanting to some to terms with her past, has the same idea!

Yuletide Reunion by Sharon Kendrick
Once, Clemmie and Aleck were in love. And now they've found that they're both single parents, and next-door neighbours. Despite the undimished sizzle between them, they decide they'd better by "just friends". But they can't seem to manage that, and the children will have none of it! They're angling for a marriage proposal...