I work in an office in which someone working down the hall is disabled. She has a Jewish sounding last name and talks to me about her family's practices in regard to being members of a Reform temple and keeping certain Jewish traditions like going to Miami for Passover (we've had this conversation tongue in cheek, but it impressed upon me that she has experience in Jewish practice).
Yesterday she made a comment that led me to strongly question whether she is, in fact, Halachically Jewish.
Until now I've been very mindful of avoiding situations in which I have to aid her with certain things that might constitute Lifnei 'Iver or Mesayea' issues (causing someone to sin or helping someone sin if they would have sinned anyway). If, however, I have a doubt that she is actually Jewish according to Halachah, do I need to worry about these things?