Twin of Ice
Montgomery/Taggert (Publication order) #6; (Chandler Twins, #1)
Happily betrothed to Dr. Lee Westfield, Houston is every bit the good girl she was raised to be. So when faced with Kane Taggert's brash marriage proposal, Houston is outwardly shocked. But beneath her gracious demeanor lies a woman of hidden longings -- and her defenses begin to melt the second this rugged stranger touches his hungry lips to hers.

Meet Houston's impetuous identical twin sister, Blair Chandler, in Jude Deveraux's Twin of Fire.
Happily betrothed to Dr. Lee Westfield, Houston is every bit the good girl she was raised to be. So when faced with Kane Taggert’s brash marriage proposal, Houston is outwardly shocked. But beneath her gracious demeanor lies a woman of hidden longings — and her defenses begin to melt the second this rugged stranger touches his hungry lips to hers.

Montgomery/Taggert (in chronological order):
The Black Lyon (Montgomery/Taggert, #1)
The Maiden (Montgomery/Taggert, #2)
The Velvet Promise (Velvet Montgomery Annuals Tetralogy #1) (Montgomery/Taggert, #3)
Highland Velvet (Velvet Montgomery Annuals Tetralogy #2) (Montgomery/Taggert, #4)
Velvet Song (Velvet Montgomery Annuals Tetralogy #3) (Montgomery/Taggert, #5)
Velvet Angel (Velvet Montgomery Annuals Tetralogy #4) (Montgomery/Taggert, #6)
The Velvet Quartet Velvet (Montgomery Annuals Tetralogy #1-4)
The Heiress (Montgomery/Taggert, #7)
The Raider (Montgomery/Taggert, #8)
Mountain Laurel (Montgomery/Taggert, #9)
Eternity (Montgomery/Taggert, #10)
The Duchess (Montgomery/Taggert, #11)
Twin of Fire (Chandler Twins, #1) (Montgomery/Taggert, #13)
Twin of Ice (Chandler Twins, #2) (Montgomery/Taggert, #12)
The Temptress (Montgomery/Taggert, #14)
Wishes (Montgomery/Taggert, #15)
The Awakening (Montgomery/Taggert, #16)
The Invitation from “The Invitation” (Montgomery/Taggert, #17)
The Princess (Montgomery/Taggert, #18)
A Knight in Shining Armor (Montgomery/Taggert Family, #19)
Sweet Liar (Montgomery/Taggert, #20)
Matchmakers from “The Invitation” (Montgomery/Taggert, #21)
Change of Heart from “A Holiday of Love” (Montgomery/Taggert, #22)
Just Curious from “A gift of Love” (Montgomery/Taggert, #23)
High Tide (Montgomery/Taggert, #24)
Holly (Montgomery/Taggert, #25)
Someone to Love (Montgomery/Taggert, #26)
Forever... (Forever, #1) (Montgomery/Taggert, #27)
Forever and Always (Forever, #2) (Montgomery/Taggert, #28)
Always (Forever Trilogy #3) (Montgomery/Taggert, #29)
True Love (Nantucket Brides, #1)(Montgomery/Taggert, #30)
For All Time (Nantucket Brides, #2)(Montgomery/Taggert, #31)
Ever After (Nantucket Brides, #3)(Montgomery/Taggert, #32)
Met Her Match (Montgomery/Taggert, #33)
Simple Gifts: Just Curious / Miracles / Change of Heart / Double Exposure (Montgomery/Taggert)