Tara is one of Megan’s acquaintances. Megan often uses hanging out with Tara—which she actually does very rarely—as an excuse to get out of the house. This allows her to get away from Scott so that she can rendezvous with her lover, Tom. Tara is indifferent to Megan and happy to lie for her.
Tara Epstein Character Timeline in The Girl on the Train
The timeline below shows where the character Tara Epstein appears in The Girl on the Train. The colored dots and icons indicate which themes are associated with that appearance.
...and Scott has told reporters that he believed she went to stay with a friend, Tara Epstein—but Megan never arrived at Tara’s house. Megan was last seen walking toward Witney station... (full context)