Son and mother

After hearing those four words from queen, world of Jon turned around. Yes, Cersei behaved much friendler than he expected, she always wanted to see him, paid huge interest to each event in his life.... That now makes sence.... But EDDARD STARK AND CERSEI LANNISTER? Jon Snow could not believe his own ears.

Jon: You... are my mother? And you...loved my father, lord Stark?

To Jon's surprise, queen laughed. Not evilly or cruelly, more like out of ridiculousness.

Cersei: Ah... sorry... Jon... You have no father... your second mom was Lyanna Stark....

LATE AUNT LYANNA? How? What? Two women can't....

Seeing Jon's confusion, lion queen smiled and explained: We used Valyrian magic spells... We loved only each other, but sadly... evil prince Rhaegar stole her from me. You were born in Tower of Joy, where she told truth to your father... and he - to me, who knew that you existed still.... We decided to keep it in secret, but now... I see you, strong, brave, kind.... just like she was...