Goddess Sarasvati, by the standard mythological authorities, is the wife of Lord Brahma. The Vaishnavas of Bengal have a popular legend that she was the wife of Lord Vishnu, as were also Goddess Lakshmi and Gangā. The ladies disagreed, goddess Sarasvati, like the other type of learned ladies, Minerva, being something of a termagant; and Lord Vishnu, finding that one wife was as much as even a god could manage, transferred goddess Sarasvati to Lord Brahma and Gangā to Lord Siva, and contented himself with goddess Lakshmi alone.
YES Narayana Has Three Wives: Lakshmi, Saraswati, Ganga
लक्ष्मीः सरस्वती गङ्गा तिस्रो भार्या हरेरपि ।
प्रेम्णा समास्तास्तिष्ठन्ति सततं हरिसन्निधौ ॥ १७ ॥
Narayana says: O Naarada! Lakshmi, Saraswati and Ganga, these are Three Wives of Hari Vishnu,
who always abide closest to Vishnu with love and harmony.
Devi Bhagwatam, Ninth Book, Chapter 6, verse 17.
Lord Narayanan wife is maha Saraswati her half amsa remained in bramhloka as Saraswati quarter amsa as Saraswati river like Ganga also Sri bhu nila are wife's of para Vasudev in vaikunta vyha in paramapadam there will difference in consort as per Murti difference ,Shakti will be according to murtis.
Saraswati is amsa of maha Saraswati Saraswati is Vidya Lakshmi expansion of Radha Devi ,every purana is true but as per kalpas the deity of Kalpa change sometimes Shakti some times shiva some times Vishu some times Ganesh etc