I was reading Markandeya Purana and found that there is a mention of Duryodhana being a son in law of Balarama. I am not able to find more information about this in Markandeya Purana. I am looking for information on how Duryodhana became the son in law of Balarama and who was Balarama's daughter in this story. The below quote is taken from Canto VI - Baladeva’s brahmanicide of Markandeya Purana.
The plough-armed Rāma,
knowing the perfect affection of Kṛṣṇa for Arjuna, deliberated
much—“Can what has been done be better done? Without Kṛṣṇa, assuredly,
I will not go near Duryodhana; or how, siding with the Pāṇḍavas, shall
I slay king Duryodhana, my royal son-in-law and disciple? Therefore I
will go neither to Arjuna nor to king Duryodhana. I will myself bathe
myself at holy bathing places, so long as it conduces to the ending of
the Kurus and Pāṇḍavas.”
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