YBN Almighty Jay Got Baby Mama Pregnant Before Dating Blac Chyna

Blac Chyna's suspicions about YBN Almighty Jay cheating on her are inaccurate ... at least when it comes to his ex-GF, turned baby mama.

As you probably know ... BC dumped her 19-year-old piece earlier this summer, because she was fed up with YBN sliding into different chicks' DMs and possibly having a side piece.

His announcement over the weekend that he now has a new baby boy -- SirLucius Edward Scott-Bradley -- might seem to confirm her fears, but we're told the baby making went down before Chyna was in the picture.

Waiting for your permission to load the Instagram Media.

ncG1vNJzZmivp6x7tbnZZ5qopV9nfXKEjmpoaGpmZMajuoyao6ahl53BunnJmrBmnJGZeqWt06KloGWSlq%2B6ecyapJplkqGupHnCobCnmV8%3D