A heavily pregnant Kelis has unleashed an angry rant, accusing her estranged husband, rapper Nas, of infidelity. The ‘oilkshake’ singer writes on her blog, “I would like to touch on the subject of cheaters. Why be cowardly? Why not go after what you really want? All the scumbag coward husbands and less-than-impressive sluts unite! You can all go down in flames together. Hooray! Who’s disgusting and bitter? Not I.” Kelis adds, “The husband is way more at fault, of course, but the women who partake are stupid and pitiful.” The R&B star filed for divorce from Nas last month, after four years of marriage. She’s currently expecting their first child.