Throughout the drive, he went a little bit further and further until he got her tank top and bra off. He told her to leave the bra off since she's going to wear a cardigan over her tank top for the flight.
In the car he had her sitting on him facing me, she didn't look at me so it made it easier to watch him using her. I was still feeling embarrassed and she too I think, although hopefully for herself mostly and not for her husband. He teased her nipples the way he's learned from me. When she was fully erect and engorged, he pulled her tights and panties down. He lightly played with her clit while she writhed on his lap. After she was obviously very wet, he dipped two fingers in her but just left it in there. She was making small humping movements to his two fingers to start a fucking motion but he didn't. He just took it out after a while and stuck his two very wet fingers in front of her. He then went back and forth between tweaking her nipples, lightly rubbing her clit and then putting his fingers in my wife until she was obviously aroused enough to want to come but not reaching there.
When we reached the airport parking lot, he made her suck his cock while we were parked. He told me to pull my cock out and masturbate. I did and I came in like under a minute. After my climax, I felt even more shame and he finished in her mouth. He kept her mouth on him until she sucked it down and licked him clean.