We enjoy mfm with a guy we know, done it a lot in about 4 yrs. Typical dress code, I'm in slacks, button shirt. Wife in a dress, not slutty at all, sometimes stockings, sometimes white cotton underpants, sometimes no underwear, semi sexy bra or no bra but always a nice dress and heels. Him similar dress code as me. We have a drink in the kitchen, wife has 2. She hugs him saying we're glad he's visiting, she'll French him for a min then does same with me, back and forth a few times. Up to the bedroom, she undresses in front of us, him and I get naked. We play for a couple of hours. He gets dressed, she always puts on my shirt leaving it unbuttoned and slips her heels on. I stay in bed, she walks him to the door for a goodbye kiss, she says he always slips his finger into her pussy. She comes back to bed and we go one more time.
So for us it's how she's dressed when ne leaves.