Maybe it's my mistake thinking that a swing couple implies doing it with couples... when did they had couple vs couple??? The last three couples was only to work with sina (no idea why loool)
So why not delay the prepared sex marathon for the next day?? If they know was nothing serious and she will be back basically after the guests leaved
Stif was there just to film and "offer" the installations .. If he was such in "pain" he could have left to bedroom before, but maybe that wasn't good for the views and expectations ... Maybe the reason of no delay is another orgy is already prepared for today