My Little (Poisonous) Spider

I saw her in my garden for the first time a few weeks ago.  I went to grab the watering can to water my chili plants.  While I was filling up my watering can, I looked down to find a redback spider, fiercely guarding her web!
Like a baby, I shrieked at first and nearly dropped my watering can.  I ran inside to show Justin, but when we came back outside, she was gone.
Don't get me wrong... I'm used to spiders by now.  I probably see about four a day inside our house.  I've actually given up trying to eliminate them and will typically only kill them if they are really scary-big (Google Huntsman spider- there's nothing like having a tarantula-sized spider hang out on the edge of the wall by the ceiling) or if they are in my bed (I once awoke to a medium-sized spider crawling across my head.  Yeah, I was up for the day after that incident.)  If I see a spider outside, I figure that this is their territory, so what right do I have to kill it?  Plus, they are so useful for catching flies.
You must understand that my fear arose solely from the fact that it was a female redback, a notoriously poisonous spider who is a relative of the black widow.  Redback bites have the capacity to kill people, but this seems to be a somewhat rare situation.  Apparently, this hasn't happened for a very long time.  Based upon my research, I've surmised that if you get bit, you may need to go to the hospital and receive anti-venom treatment or you'll just need to put ice on the bite and you'll be just fine.
A few days passed by, when I was back in the garden and guess who was there?  I was ready to kill it, but then decided to watch and wait.  I soon became transfixed with my observation and realized that I just didn't have the heart to kill it.  To be in the presence of something so tiny, but potentially lethal, is pretty radical.
Things are cool between us.  I know where to find my little poisonous spider and she knows to expect me (okay, probably not, but I like to imagine this).  Why squash her when we've got a good thing going?  I will be the first to say though that if I see a male red back hanging around or an egg sac, all bets are off.