A Baby for Christmas by Trish Morey

Standing in for your twin just got complicated…

Tegan Fielding is supposed to be masquerading as her twin, not sleeping with her sister’s boss! But as the agreed week turns into longer, James Maverick is proving too sexy to resist. And so she doesn’t––even if he doesn’t know who she really is.
But Tegan is soon falling for the tycoon, and as Christmas approaches, she makes a shocking discovery. How will James react when first he finds out that not only his convenient mistress isn’t who she thinks he is, but that she’s expecting a special, seasonal delivery?
NOTE: This book is a reissue of “The Boss’s Christmas Baby”