By Amber Goodhand - Breaking Celebrity News Reporter

Just one month after Fantasia had a baby with boyfriend Antwaun Cook, a pal close to the former American Idol winner exclusively tells Breaking Celebrity News that he's been cheating on her — even before she was pregnant!

"Antwaun has been cheating on Fantasia all along, just like he cheated on his wife with Fantasia," the source said.

"She was silly to think he'd remain faithful but it was wishful thinking, I guess. She purposely had this baby with him hoping he'd be a devoted father and boyfriend."

But the source exclusively tells Breaking Celebrity News, it's not happening. Not only has Antwaun cheated on Fantasia with other women, but he's even went crawling back to his estranged wife, Paula Cook, asking for another chance.

"He tries to get Paula to take him back all the time, but she wants nothing to do with him," the source revealed.

"Fantasia knows that Antwaun cheats, but she just turns a blind eye hoping for some fairytale turnout."