A Pennsylvania woman has pleaded guilty to third-degree murder charges after crushing her boyfriend to death – by sitting on him. Prosecutors say Windi Thomas, who weighs 300 pounds, attacked her 120-pound boyfriend Keeno Butler with a knife and a table leg, then sat on his chest, causing him to smother to death. Thomas told police she had been drinking all day and had left to buy crack shortly before attacking Butler. She’ll be sentenced to 18 to 36 years behind bars. Should Thomas face a heavier sentence than 18-36 years?