Rapper 50 Cent’s ex-girlfriend, Daphne Joy, has threatened to sue Rodney “Lil Rod” Jonesover accusations against her in his $30 million lawsuit against Sean “Diddy” Combs, RadarOnline.com has learned. In Lil Rod’s lawsuit, he claimed Diddy paid City Girls rapper Caresha Romeka Brownlee, A.K.A. Yung Mami, and Joy a monthly fee for alleged sex work. On Thursday, Joy took to Instagram to deny the accusations — and revealed she’s “retaining an attorney to explore all legal remedies” against Lil Rod. Joy posted a statement to her Instagram stories as well as a post. “I am deeply hurt by the lies in…