R&B Singer FANTASIA’S Brother Is SNITCHING . . . Claims He Was SMASHING Blac Chyna . . . Behind Rob’s Back!! (His Exact Words Are . . . ‘YEAH I F*CKED’)

: Now that Blac Chyna’s alleged cheating on Rob has come to light, all of her alleged SIDE D*CKS are running their mouths on social media.

The latest SNITCH is Fantasia’s brother Rob – look what he said: