Start with Pizza Dinner or Steak Dinner this time:

Go to the bedroom to put on a swimsuit
Wait for her in the hallway
Get in the hot tub
Suggest playing “Truth or Dare”
Truth  or  Dare (does not matter)
Yes  or  No or Finish dare (does not matter)
(Pick a question, does not matter)
(wait for her to finish answering)
Dare
Dare her to take her top off
Dare
Dare her to get naked
Kiss her
Kiss her nipples
Massage her thighs
Grab her butt
Rub her pussy

And that is how you have sex in the hot tub