I have to agree with annabel.
Either hookup with woman at a bar or something, where they know there is nothing beyond the one-night stands you are allowed to have, or renegotiate with your wife.
At least tell this woman your arrangement with your wife BEFORE your date night! She may have hoped for at least a month long fling.
I know in the beginning, my husband and I were one night stands only as well, but as I've grown and our relationship has matured, I prefer the relationships I have now. And I prefer him to have relationships over one night stands, not that one nighters dont happen still occasionally but we both prefer relationships. The sex is better anyway!
- For the pursuit of happiness, not the sit around and wait for happiness -
Jen - bi female
John (Juntas)- husband
M - John's girlfriend