Personally, and this is just us and me speaking here... We would not play during pregnancy. For us it is has been a time of great intamcy between us that we would not want to share with anyone else. So I see your wife's point. My advice would be to cool your heels and respect her wishes to not play for awhile. Even if she says it's okay for you to meet others she may just be saying this to appease her. If it's her choice not to play, you should also, voluntarily, do the same.
Again, this is my opinion and every couple is different, so take it for what it's worth.
Mr. WS