I am making a blueberry pie for guests coming tonight. The recipe suggests topping it with whipped cream. I have sour cream, and do not have whipping cream. Can I sweeten the sour cream just a little bit, maybe with some lemon zest and use that as a topping of will it be weird? I can get whipping cream but the sour cream was bought for a recipe I didn't make so has no designated use and I would be happy to use it up.