Mistletoe Daddy by Deb Kastner

After Vivian Grainger buys him at the town's charity bachelor auction, Nick McKenna feels obligated to help her construct her dream spa and beauty shop in time for Christmas--but the cowboy won't be sticking around. When he realizes Vivian is pregnant, though, everything changes. Seeing the joy she brings to everyone around her, it's clear to Nick that Vivian and her child are what's missing from his life...

The Cowboy's Christmas Baby by Carolyne Aarsen

No one expected Erin McCauley to arrive in Saddlebank, Montana, with a baby...and no wedding ring. Especially not Dean Moore, who cared for Erin but knew she would never go for a hard-living cowboy like him. While helping renovate Erin's new home, Dean realizes he's still in love with her--and with her beautiful daughter. But can Erin see that Dean is offering exactly what she's longing for?