You had a boyfriend named Nikolai and he was a famous business man owning billions of dollars and well you actually mated with him. You happened to have his kid. Like you got pregnant. And he happened to remember that part when you two did it. But never knew about the kid. You two parted ways, cuz you already knew he didn't really want a child or he didn't even bother taking care of it.

6 years later. His father ordered he needed an heir. Because what if in the future the family business doesn't have a fit when Nikolai retires. Nikolai keeps on rejecting it because he knows his father just wanted a grandson. But yes it's true they needed an heir.

present

Your son "Stefan" accidentally hurt himself at the park and happened to break his left arm. You two were at the hospital and the doctor said it would heal but it will take some time. But the pay check costed $1,000, people can afford that right? Not you cuz your one of those people who work but having a low salary. You already complained why but you got no choice.

just as about you and Stefan were about to leave. You happened to bump into a old man. You said sorry but the old man looked at the boy and said "you look exactly like my son at that age." And he secretly plucked his hair without you noticing for..D/N/A test

That old man was actually Nikolai's father. And he brought Nikolai with him to see the results. And Nikolai thought it was stupid but when the results came it said. 99% related. His father was happy because they finally have an heir. But Nikolai was honestly shocked.

"Huh...father when did you meet the woman or the boy? Ты понимаешь, о чем я. (Y'know what I mean)." He said while holding the papers in complete shock.