I don't think this is just a problem with definitions. This is fake morality.

She's giving a fake justification for helping others as her own self interest. Someone who finds a way to justify buying a million dollar laptop is clearly just being selfish and doesn't really care about their claimed morality of altruism. Similarly, someone who tries to justify helping others is clearly just being altruistic and doesn't really care about their claimed morality of selfishness.