A Serbian Milkshake is a sexual position that involves a threesome: 2 girls and 1 guy. The guy and one of the girls both cum into the other girl's mouth at the same time while he mixes it around in her mouth with his cock.
John and Kate enjoy a romantic anniversary dinner while
Susan comes along with big tittas. 17 minutes later John
and Susan cum into Kate's mouth while he mixes it. She
swallows. Serbian Milkshake