This story is not there in Mahabharata but is actually an Andhra folklore. It seems that Vatsala(Sashirekha), the daughter of Balarama is betrothed to Abhimanyu. So initially the marriage of Vatsala is to be performed with Abhimanyu but when Arjuna goes into exile Balarama's wife Revati says that Abhimanyu's father has no kingdom left and a prince without a kingdom may well be a commoner. Balarama thinks about it and feels that his wife is right and that he is supposed to think about the welfare of his daughter breaks off the marriage with Abhimanyu. He arranges it instead with Duryodhana's son Laxman. When Abhimanyu comes to know about this he is annoyed and asks Krishna to intervene. Krishna says he cannot do so but he should ask help from his first cousin Ghatotkacha who lives in Varnavat. Abhimanyu sets out to Varnavat and meets his brother telling him why he seeks his help. Ghatotkacha is furious at Balarama because he wants to keep an alliance with the very people who were the cause of the Pandava’s misery. Meanwhile the marriage preparations take place at Balarama’s house. Ghatotkacha goes disguised as Vatsala to the marriage ceremony. He frightens the hell out of Laxman who promptly faints. Laxman vows never to marry. The real Vatsala has been transported by Ghatotkacha to Varnavat where Abhimanyu awaits. The couple’s marriage is celebrated. When Duryodhana learns that Abhimanyu has married Vatsala he is infuriated and thus his anger toward the Pandava’s is further fuelled.