Megan Thee Stallion is putting her now ex-boyfriend, Klay Thompson, on blast! On Saturday afternoon, the rapper took to Instagram Stories to accuse the Dallas Mavericks player of CHEATING on her! OMG! Not only that, Megan claimed that Klay then had the audacity to tell her he doesn't think he can be in a "monogamous" relationship anymore! What the f**k! She wrote: "Cheating, had me around your whole family playing house... got 'cold feet'.