Circa 2244, Alison had a brief relationship with Starfleet security officer Michael Fuller, which resulted in her becoming pregnant. On the day that Michael was to sign aboard the USS Endeavour, Alison met him and informed him of the pregnancy, in the hopes that he would leave Starfleet and help her bring up the child once it was born.
Michael choose to remain in Starfleet, however, and Alison was left to bring up Sam largely on her own. In 2266, Michael broke years of silence and contacted Alison to inform her of Sam's death during the USS Enterprise's mission to Starbase 42. (TOS novels: Seeds of Rage, Demands of Honor)