Radha and Rukmini were co-wives, Radha was the first consort of Shri Krishna and his eternal consort in Goloka. Radha and Krishna got married in Bhandirvan. That Radha marrying Rayana (brother of Yashoda) is completely an interpolation happened in late Medieval or early modern era and even in this story, real Radha did not marry Rayana, only her reflection. If such a thing did happen, probably Krishna’s aunt had motherly affection for him and she became his strong devotee due to which she was called reflection of Radha. The daughter of Vrishbhanu and Kalavati was married to Krishna only and no one else.
Radha did not accompany Krishna to Mathura and later Krishna got married again when Rukmini, princess of Vidarbha called him to take her away. Krishna married Rukmini and she was his one of the Chief Consorts in Dwarka. Her son Pradyumna was the Crown Prince of Dwarka. Radha remained in Vrindavan as it's Queen and ruled over the region for Krishna. Her devotion towards him was extremely pure that despite living separately, her heart was solely set on Krishna.
Radha ruled over Vrindavana as it's Queen and Rukmini ruled over Dwarka. Years later, Krishna along with Ashtabharyas met Radha and other Gopis at Siddhasrama where Radha and Krishna were absolutely delighted to be reunited. Radha met her co-wives and they met with warmth. Later, that hot milk episode made the queens realise that Krishna and Radha’s souls were one and their devotion towards each other was divine.
Radha and Rukmini never really lived together as co-wives, so , any type of jealousy is not recorded and also the personalities of both queens wasn't like that they would let themselves be entangled in petty jealousy.
In divine versions, Rukmini and Radha both are Mahalakshmi, Radha lives in Goloka with Krishna for eternity. Krishna himself is an avatar of Mahavishnu and Radha is Mahalaxmi and Ashtabharyas are form of Mahalaxmi and Kalindi is personification of river Yamuna.