LAX (CBSLA) — What happened aboard a Delta flight from LAX to Detroit is taking the definition of inappropriate to new heights.

WDIV in Detroit reports a 48-year-old woman was arrested for performing a sex act on a 28-year-old man while the two were in their seats.

According to the report, the two did not meet until the flight. The unidentified man was headed to Nashville. The woman was connecting to Miami.

Delta is not commenting on what happened. The FBI says they’re investigating. The couple faces a possible citation.