Soulja Boy’s girlfriend and baby mama Jackilyn Martinez is suing rapper Blueface for defamation, RadarOnline.com has learned. According to court documents obtained by this outlet, Martinez claimed Blueface spread misinformation about their relationship and the paternity of her child. Martinez filed the lawsuit after her boyfriend and Blueface got into a heated argument on Instagram Live, in which the Thotiana rapper alleged he slept with Martinez — and insinuated he might be the father of her child. Martinez said those claims are “false.” The Los Angeles-based hairstylist accused Blueface of d…