I Don't Want Your Late LoveEpisode 4

Four years climbing seventeen flights because her key fob never worked. Then she discovers why—her best friend is registered as her boyfriend's spouse. When she's publicly branded the mistress, shoved to the ground, and loses her baby, she walks away with nothing but her name. Now her ex begs for forgiveness and her best friend is destroyed. Will they ever know the real cost of their betrayal?