Why He Came Back?

This story is about merriage of a couple
Jin loves jisoo but jin love someone but he made jisoo pregnant but jin's mistress is angry cause jin has no time for her, so jin leave jisoo with a little boy son, but after 5 years, jin came back to jisoo and his son and daughter which is Andrei and princess, but the children know that jisoo and jin has a relationship, so jinsoo pretend that they have a relationship. Would they be fall inlove again in each other? 💖