Mummy Tee Rak revolves around three families. One day, Primma finds herself pregnant with her boyfriend Panu. However, Panu has a bright future and is going abroad to study. Therefore, Primma decided to keep the fact of her pregnancy a secret and runs away to be a single mom. Several years pass before the returned Panu finds out that Primma was in fact pregnant with his child. He thus begins to attempt to win her back. However, Primma now has another suitor, Peera, who is a gentle chef. Gunnaree, is a working woman and works as a financial controller. She has always thought of having a baby and so decides to freeze her eggs while they are in optimal condition and wait for the perfect sperm. One day, Gunnaree meets Chanachol who seems perfect for her. He allows her to use his sperm for the sperm insemination procedure because he too wants to have a child. Unfortunately, they discover that this procedure is not allowed for unmarried couples. In order to fix their dilemma, Gunnarree proposes that they get married for the time being until they can both have a baby. Chanachol accepts the offer, but little does Gunnarree know that he has a secret — he is still in love with someone else. Sarinta has to survive with her strict politician husband, Poramet, who views societal image and opinion more than anything in the world.