|Solange and TaQoya Bransomb|
Mathew Knowles' baby mama was tight with Solange Knowles ... but Solange had no idea her friend was banging her dad.
TaQoya Branscomb has sued Mathew, claiming he got her in 2010 ... around the time Beyonce's mom, Tina Knowles, filed for divorce.
We're told TaQoya met Solange in 2008 through a stylist. They hung out together on occasions in nightclubs and bars in Houston. Now here's where the plot thickens. We're told Mathew knew his daughter was hanging out with TaQoya. But Solange was in the dark.