Sister in law pissing

I really enjoy sniffing and tasting my wife's sister's knickers and thinking about her getting do by bbcs.
Bit the other night we was all at the beach having a few drinks. My cock was already twitching from see sis inlaw and wife's friends in swim suits (tits and bums) but when sis inlaw needed a piss she didn't hold back and went right in my eyes site , my wife and sister in law husband was right there but I couldn't was the opportunity to have a good look.