The gorgeous hostess sets a shining example to the rest of her crew.
The party is starting; first bottles are opened, first glasses filled, first pieces of clothing thrown away.
Holy shit, I can hardly believe it! These people are no professionals but normal people like you and me, here they get drunk and indulge in sexual debaucheries.
When Tyler is ready to graduate to full on sex, Julia helps make him comfortable on the exam table so that Sandra can mount him in reverse cowgirl style and start riding him.