Need another opinion

    I have a situation where I would like other people's
    opinion. Two weeks ago, my schools enrollment went up and
    my principal asked if I would like to teach on my
    conference period (which is an extra $10,000). Everything
    was going great until another teacher found out that
    because of the master schedule, they would have to change
    their conference period from 7th to 2nd. This teacher
    raised such a fuss (started rumors, resigned off
    committees, etc), that the pricipal change her mind and
    told me that I now can not teach the extra period. So
    basicly, I lost out on $10,000 because the other teacher
    refused to switch their conference period. Should I be
    upset at that teacher when he knew if the switch wasn't
    made, I would lose out on $10,000. We are talking about
    quite a bit of money, not $200 or a minimal amount. Just
    wondering what others would think and do if this happened
    to them.