 It is speculated that Helen did not know that Dorothy was the result of an extramarital affair between Babe and his girlfriend Jennings.It is possible that when Babe Ruth learned of his mistress' pregnancy, he convinced Helen, unaware that Babe was the father, to adopt the baby girl.Babe Ruth also somehow convinced Dorothy's biological mother to allow him to adopt their daughter, so that she could be raised with him and (a possibly unsuspecting) Helen.