Shabbat Candles

Question

Question A: If a married woman is visitng her parents for shabbat, and she has her own room, but does not want to light there ( neither a candle for safety reasons, nor a lamp because it disturbs her sleep ), what does she do as far as lighting ? 1= Light where her mom lights ? 2= Skip it and fulfills her obligation with her mother's candle lighting ? Question B: How about a husband whose wife is away, and he is staying with a friend -- does he light also, or does he fulfill his obligation with his host's candle lighting ? ( the guest is staying in the living room ) This is for this coming shabbat 2-25-05; thank you for the answer.