nah, spiders normally don't like warm and moist places (thats why you find them in cellars and under houses, were its cool), so one crawling in whatever body orifice is highly unlikely.
Still a "nice" mental image
what you need to do when visiting friends with little kids
The worst ****ng thing is when you try to kill a spider and it survived just to crawl under your bed or closet out of your sight..ruining the will to sleep..