"Kylie has threatened Tyga with a restraining order since he refuses to stop calling, texting and emailing her," a family insider revealed.
Jenner's mom Kris was the first to suggest the drastic solution to the problem, and now the 18-year-old reality star "is starting to come round to the idea," noted the insider.
"Tyga's absolutely out of control and goes from begging her to take him back to leaving angry four-letter messages for her if she doesn't pick up," dished the source.
"He's so desperate right now and needs serious money fast or he's going to go under — she was his major source of income and now that's gone, Kris is worried he's capable of anything."
While it remains to be seen if Jenner will actually go through with her threat to get a restraining order against her rapper flop ex, "Kylie's warned Tyga it's coming if he doesn't leave her alone," said the insider.
Tyga's response? "He's not taking her seriously," noted the insider. "He's still convinced she loves him and it's her family forcing her to do this. That's true to a certain point, but Kylie was getting embarrassed at being seen with him. She can do so much better."