ДНК S07E53 - Выпуск 926. Нагуляла 18 лет назад?

The man decided to undergo a genetic examination with his son, but his ex-wife forbade him to do it. He's sure: so she tries to hide her infidelity. And the woman makes excuses with tears. They say she is ashamed that her ex-husband could even suspect her of infidelity! The son is also not thrilled: for 10 years he has hardly seen his official father and he doesn't care what dad thinks about him. So who is right, and who is lying in this story?