Inflatable water slide.

Hi there,

My father ordered a 31 ft water slide for May 20th. I just found out I’m pregnant and don’t want to tell him until I’m out of my first trimester. I know that if I don’t go down the slide, he would be suspicious. Would it be okay to go down the water slide? I’ll be 7, almost 8 weeks pregnant by the time the party happens. Again it is an inflatable water slide, not one that has twist and turns. Thank you for your help and advice!