Because of พระเอก นางเอก lost her baby. If พระเอก cut off the relationship between him and his ex girlfriend when his ex girlfriend came back in the first place นางเอก will not lose her baby. And นางเอก is kind of stupid and brainless. I don’t understand พระเอก acted like he loves นางเอก but every time his ex girlfriend came he always go out with her who the heck on this world will not think that he still loves his ex girlfriend.