Heather's party

My parents real estate agent... (not quite sure what to call her... she's my uncle's ex and the mother of two of my cousins... is she my aunt even though they were not ever married?  Or is she my aunt because she's my cousin's mom?) Heather had a "thank you" party at Wheeler farm for all of her clients.  My parents asked if we could come along because they were going to have a hay ride, bouncy houses, and Sammy's favorite... shaved ice.