One might think that when one of your parents gets cheated on by the other, resulting in a soon-to-be new brother or sister, you might not exactly be over the moon. At the very least, you might think that one would carry some empathy for the parent who was suffering, not the one who lied about their infidelity and then oops, got another woman pregnant. Sigh… I don't know if it's a generational thing, or if we were just as self-centered back in the day, but this is unacceptable behavior and says…