Rob and Blac have been dating only for two months.
Blac, 27, has removed any of her Instagram posts that referred to her boyfriend while Rob's own page is suddenly empty except for a photo of birthday cake ahead of his 28th birthday.
"When you just get out of a relationship & your hoe friend welcomes you back into the World of Hoe," Blac wrote.
Rob, 28, has allegedly been estranged from his family after he was linked to Blac who once dated Kylie Jenner's boyfriend Tyga.