both wendy and irene wanted to have a child... 

both found a donor 

but one day the doctor told them that the fertilization went unsuccessful and there will be no child...

wendy cried for days, while irene cheated, she drank at bars, go with other girls, etc. 

when wendy knew that Irene cheated, she broke things off...

wendy flew back to her home town Canada and stayed there,

after 2 months, an unknown number called wendy and told her that the doctor was mistaken about the child and she (wendy) will have children, what shocked wendy is that she will have twins, wendy was so happy that she flew back to Korea with her private airplane and took the donor with her to go to Canada. 

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after 12 years, grew up Julia and Hussey (twins), wendy's daughters. wendy was a successful CEO of her father's company and a good mother of her twins with the help of her sister Roseanne, best friends Jisoo and Jennie, and Roseanne's fiancee Lisa 

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while irene was in her house, regretted what she has done, Joy and Seulgi both wendy and irene's friends help her (Irene) for the past 12 years until they had a daughter yeji.

joy helped Irene to be successful and both made a fashion company 

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wendy, the twins, jisoo, Jennie, Lisa, rose flew back to Korea to stay there for a few years. 

one day, wendy accidentally met irene and joy at a fashion show with Roseanne, Irene was very happy when she met her there and was about to approach her when the show ended, but was shocked and stop, as she saw the twins saying 'mommy' to wendy.

what would happen to their life when irene and wendy met again with the twins?