Keeping up with the ruthlessly ambitious political clan that cruelly kicked her to the curb fueled the self-destructive boozing that destroyed fragile and tragic Joan Bennett Kennedy , RadarOnline.com can reveal

The beautiful former model and musician died on October 8 at 89, after a troubled life that saw her survive two miscarriages, two children's cancer battles and a shattered marriage to Sen. Edward Kennedy , rife with infidelity and a humiliating national scandal. Article continues below advertisement

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"Ted Kennedy and his family pushed her over the edge, and she was never able to come back from that," said one family

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