I talked to my stepsister about having a joint birthday party for her boyfriends son, DD1 and my nephew since they all have May birthdays. She thought it was a great idea and talked about getting a bounce house, having different themes, etc. I texted her on Monday to see if we should get together this week to discuss food, etc. I haven't heard from her since. We are definitely doing the party. Do I just plan on taking a few key foods and a cake for DD? The party is at her mom/my dads house and I don't want them to feel obligated to supply all of the food. She most likely will get back to me a few days before the party but I will be busy with DDs actual birthday, her preschool conclusion, and some stuff at church so waiting until the last minute won't work for me.