How can the karma of a mother cause result to the son?

[Ms. Laxmi Thrylokya asked: Pādanamaskāraṃ Swāmi, You taught us that the idea of revenge in a soul would cause huge loss to the very soul. To exemplify this, You explained about how Draupadī had lost her 5 sons in the war of Kurukṣetra because of her intention to take revenge on Kauravas. Isn't it the karma of the 5 sons that caused their death? How can the karma of a mother cause result to the son? Please enlighten me. - At Your Divine Lotus Feet, Laxmi Thrylokya]

Swāmi Replied: All the parameters get coincided so that every angle becomes justified. God knows past, present and future (Tānyahaṃ Veda sarvāṇi– Gītā). Since He knows the future, He arranged the five souls having short life to become the sons of Draupadī. We can say that the five died because their longevity is short. If this alone is correct, Draupadī should not have wept for them. But she wept for her five sons, who died without becoming the kings. Hence, it is correct that Draupadī is punished for her revenge and it is also simultaneously correct that the five sons of Draupadī were having short life due to the punishment of their past sins. Both the parameters are not contradicting each other, but mutually complementing each other.