I don't blame you! You totally should! Although since we brought our son home I have thought that signs like that only for expectant mothers should instead be for those with little kids! I think it HAS to be harder to lug around kids than a belly that stays attached to you, right? :-)
I second Elizabeth! I never did park in an expectant spot until after Baby Girl arrived. I figured the pregnant ladies will get it once they are lugging a 10lb baby in a 15 lb car seat with a 10lb bag. (The only place we have them near me is at Babies R Us and its for "expectant mothers.") I was telling Baby Girl infront of someone that she was going to be a big sister too. The person turned to me and said "You are expecting?" I said yes. She looked at me as if to say- are you not a little early in your pregnancy to be sharing this news but didn't say anything. Go ahead and do it! You are expecting. :) Take advantage of the little perks.
Comments are like little gifts! :)