Yeah I'm thinking that twitch she does when he cums is her cumming also. My wife often cums when I cum in her. Its a natural reaction and part of the female reproductive system.
Sharing is caring and only a caring & broad minded husband always try to share his wife with others to give her the best pleasure of romance, excitement,lust and enjoyment to fulfill all her sexual fantasies and desires. While low minded husband keep her away from exploring new adventures of romance and happiness which leads to cheating and miseries of unhappy relationship. So guys if you want your wife to be happy and love you forever then give it a try to share her with others to avoid cheating & have a fun-tastic relationship. The more beautiful the wife the real pleasure in watching with another man also what's the point of having a beautiful wife if you do not share. So get in touch if you need a bull for the service of your wife. Note: EAST OR WEST CUCKOLDING IS THE BEST.....A DEMAND OF THE NEW ERA
Or she's twitching because she's repulsed. It really seems like she was not into this at all and I think you hit the nail on the head that she likely agreed to spread for hubby. That just makes it hotter imo.
Why can't they be fully naked and rub their full body to each other, giving him the opportunity to play with her bouncy boobs whilst fucking her? I would love to see my wife enjoying like her too..