What health precautions should i bear when an unwanted guest with mercer come to the house?

my sister has a friend that i dont' close to at all. she's a short time lying **. only to incorporate that she's my bf's ex step sister. any who, so she comes over last hours of darkness, and my sister decides to bear my bikini that i just wash out of the dryer and let "her" use it. and afterwards they get surrounded by the jaccuzzi and stay in it for similar to an hour. well lo and behold , my bf tell me that his old step sister have mercer and that i need to hose my bikini now. i be pissed that she even wore it, but now i'm pissed because i don't want to entrap mercer. so what precautions do i need to appropriate. do we need to verbs out the jacuzzi...etc
Answers:

Gah, boobs.?

What is mercer?...and if you are concerned...throw out the old bikini and buy a unsullied one. About the jacuzzi...as long as you properly chlorinate it...nothing is going to survive for vastly long.

Please help sex?

Are you should you own the right name of the diagnosis?

I asked a sound out earlier?

What the heck is mercer?