One of the requirements for one week only mission is to have splash in the sims social showtime ritzy dip pool.
it’s available on bella’s house, but where to find this item on shop ? because i don’t think it’s available yet.. maybe they will make it available at saturday / monday with cash 😛
anyway just go to outside of bella’s house and click ‘splash’ on this item
some of the action requires some relationship to unlock
list of actions you can see :