Touching her in public while talking to the waitress

There is a girl sitting with an uncomfortable face, she waits to be served by the waitress and while it happens her vagina is being explored by someone else, she bites her hands to stifle the desire to scream with delight, meanwhile the waitress spreads the menu and the young woman she takes it, trying to act sane as the young man’s fingers slide over her labia and clit.