There are some people and doctors that believe the occasional glass of wine while pregnant is ok. The problem with that is that there is no amount that has been proven to be safe . So I would say stay away from the wine .
Contrary to popular opinion, drinking moderate amounts of alcohol (two or three glasses of wine a week) after the first trimester, hasn't been demonstrated as dangerous or risky behavior that will harm the baby. Alcohol is mainly metabolized by the liver, and only what's left will be met by the placenta. The amount that could reach the foetus in a glass of wine is negligible.