Her Deadly Rival (1995)

Jim and Kris Lansford are a happily married couple when Jim takes a new job that requires him to move. In the brief time he and his wife are apart during the transition, Jim attracts the attention of a mysterious woman who begins calling and sending him gifts. When Kris joins Jim in their new home the unwanted attention continues leading to marital discord. Who is the woman stalking Jim and what will she do next?