Maternity Pictures

I was fortunate enough to have the lady who did my wedding pictures, to offer to do my maternity pictures...FOR FREE. She needs a model to update her portfolio and asked if I would be willing, which of course I said YES!  Only problem is it's for this Saturday at 1. It's suppose to be around 60ish degrees outside and I have no idea what I should wear. Her only request is that I stray away from wearing black, as it had a tendency to hide the bump as where she wants to excentuate it. Any ideas? A spring dress, leggings & maternity top, jeans....please help! 
Below is pictures of the location we will be shooting at. Of course it won't look so much like Fall, but more Spring.