SB 4.1 states that Lord Vishnu and Goddess Laxmi incarnated as siblings Yajña and Dakṣiṇā. They were actually children of Ruchi and Akuti. But, Svāyambhuva Manu brought home Yajña, and Ruci, his son-in-law kept Dakṣiṇā. Yajña and Dakṣiṇā later got married.
The above incident is from Svāyambhuva-manvantara, the beginning of creation. Are there any instances where god and his consort incarnated as siblings in Vaivasvata-manvantara? If yes, whom they got married?