ANCHORAGE, Alaska – The on-again, off-again engagement between Bristol Palin and Levi Johnston is off — again.

The 19-year-old daughter of former Alaska Gov. Sarah Palin called off her wedding plans after Johnston told her he may have fathered a baby with another woman.

Bristol Palin did not identify the woman when she gave a teary interview to People magazine to announce the breakup. A pregnant ex-girlfriend of Johnston has publicly denied he is the father.

Palin said Johnston told her about the baby on July 14, the day the couple announced their re-engagement. Palin and the 20-year-old Johnston have a toddler son together, Tripp.