It was his Reina.

She had become someone else's wife, married to Darren.

Lyndon turned his gaze to Rena, realizing that she was the same age as his long lost daughter.

Upon closer inspection, he saw a resemblance, a reflection of himself in Rena's youthful features. Rena could very well be his biological daughter with Reina.

Yet, he had caused Rena immense suffering.