YEATER’S TEXT MESSAGES HINT OF FABRICATION

Justin Bieber's alleged baby mama sent a text Wednesday to a friend, begging him to erase an incriminating text in which her mom says someone OTHER than Justin Bieber is the baby daddy, and then promising to give him a cut of the action when she scores a payday.

The person to whom Mariah Yeater sent the text asked us to blur his name -- we'll call him John.  He has been in touch with Yeater regularly ... even before the baby was born on July 6.