I look at it this way: we reveal ourselves by how we treat our helpless opponents.
Perfectly normal to have the emotional response of 'serves her right.' The better person has to stop, set the emotion aside, and ask whether the treatment fits their moral framework. If you can't articulate why a transgendered friend, convicted of some crime, should be cross-housed, then this woman probably shouldn't be, either.
Feeling conflicted is good - it's your rational brain fighting with your emotional brain and winning.