BEST REPLY TO THAT THREAD ON THAT FORUM IS THIS ONE;)..
Husband, father and occasional visitor to massage parlours here.
I appreciate you feel betrayed and somewhat disgusted by your husband's behavior, I can only say that it isn't necessarily a reflection on his love for you and it's certainly nothing to worry about in terms of the children. Everyone struggles with monogamy, statistically, it seems as if its almost impossible to achieve.
The transaction would have been just that, there would be no emotional exchange, he would be on a massage table and she would gradually wind him up before engendering the happy ending. This isn't even cheating in my mind, just a physical reaction to stimulus. Sometimes the fun is in doing something new and I really don't think you should give him or yourself too much of a hard time about it. Some of these places do lady massages too, with well trained, oiled hunks offering the Tantric service to ladies too, I send my wife and she loves it. Our relationship is stronger than ever.