No. You can have sex in a hot tub, and you can have sex in space. But you can NOT have sex in a hot tub AND in space. The water would not stay in the hot tub in zero gravity, and would float around causing all kinds of havok. You would probably be in serious trouble with all that water floating around inside your spacecraft, shorting out electrical equipment and such to worry about trying to have sex anyway. What kind of thinking let you to think it was a good idea to put a hot tub in a spacecraft anyway?