Loving Riley Series by Abra Harrington

Physics Major Riley Kendrick has always been attracted to Seth, a young man his parents adopted as a teen, and Seth's wife, Carol; he's convinced he'll never have either of them. But when he catches them being intimate in his bed with only two weeks before Christmas, his lonely world is rapidly turned upside down. "Let It Snow" is a M/M/F steamy contemporary romantic short with a HFN ending.