Why is it....?

Today, Friday, my sweet German boy's family is in town.  I am hostessing them.  In Scottsdale.  My city. My state.  My country.  Plans changed like the wind all day.  We were supposed to go out to dinner as two families...but that did not happen.  We ended up in Scottsdale OLD town at 5 with a very hungry crowd (after they spent the afternoon getting their RV).  We sat down to eat at Culinary Dropout and they all ordered huge meals.  Nothing I could do to stop them.  I ordered something light....so we could continue with our plan of going to CPK with my kids and Bill.  At 7pm I called home and asked Bill to fix pizza for the kids...because we had changed plans.  NO CPK tonight.  Whah whah.  Lexi was disappointed, but she was good and took it well (according to her texting me!).  They had Pizza, we walked around Fashion Square and then arrived home at 8:30 just in time to meet the AYA rep Sherry.  She had to do an exit interview with Michi.  When I arrived home.....the dishes from Bill's dinner with the kids were piled next to the sink...as if....it. is. my. job. to. clean. up!  Sheesh!  SO, simple question:  Why is it that I make dinner so MANY nights, almost every night....and still have to clean up after myself?  Just asking...... WOW.  It really hurts!