The Sister Secret by Jessica Steele, Paperback by Harlequin Romance, 1995. This is part of their Family Ties Series, Book No 3385 December.
Belvia and Josy were twins but, although they looked alike, they were chalk and cheese when it came to their characters. Josy had always been painfully shy, whilst Belvia--well, she wasn't afraid of speaking her mind.
When sisters are in a tight spot they stick together. Josy had a secret that Belvia was determined to keep. And that meant keeping Josy away from Latham Tavenner. Unfortunately the family company needed Latham's help. Belvia had no alternative than to attract Latham's attention.
Book near Perfect, like new condition