We have been playing with our best friend Bill since the mid 1980s, so having a threesome with was not unusual. What was unusual was we went over to his house instead of him coming to our house.

We have a king size bed that is very nice for playing, but over the last 10 years my wife has started to have hip problems that have limited the positions she is comfortable with. That's especially true of intercourse itself which is very frustrating, especially in mmf threesomes where my friend and I would both like to have intercourse with her and have to be so careful of her physical limits. I usually end up getting off in other ways during the threesome so he can have the intercourse.

That's not really a problem with me since I have always enjoyed watching or hearing about them have intercourse. A while after they got me off last Friday, I went into another room. I would check back in to watch them off and on.

They must have spent 30 minutes having intercourse before they finished. My first thought was that my wife was really going to be hurting the rest of the evening and for the next few days.

After we got home we talked quite a lot about the fun we had both had and she didn't have any of the usual hip pains she usually had after even a little intercourse.

When she got up the next morning, I asked her how she was and she said she was a little congested which is very normal for her all winter. I then asked about her hip and she said it was fine and about what it would feel like an easy workout.

She said the waterbed was wonderful for her. It put no pressure on her hip in any of the positions she had been in the night before.

My wife and I don't think we would like to sleep on a waterbed, but it is very nice for her when we play.

My wife had actually played with Bill on that waterbed before, but that was 30 years ago when she didn't have all the joint pains that come with age.

Bill and my Wife are already planning another play session in a couple of weeks. It could be a threesome or just the two of them playing alone. I actually prefer that it be just the two of them. It would be nostalgic because that's what they usually did when we had kids. At that time my wife was not working and Bill was working nights. We had just started swinging with him and they were both very sexually turned on by each other.