mad at hub

im 8months prego today were celebrating our almost 6 year olds birthday party. we were gonna go to the big pool its a park by us with big slides diving boards huge splash pad and such then hit up a movie after just the "4" of us. but like 90% of the things I cant do at the big pool... soo basically im just gonna be standing there... which is ok but not the most fun and not really spending time with my son. i told my hubby a month ago he would need to do these things with him cuz i cant. he had no objections to it!! well now that its today and he wants to be lazy he doesn't wanna do shit and im fing pissed!!!!!!!