Single guy + married woman

Someone told me that he met somebody special. He even showed me a photo of her, a very beautiful young Thai lady. I felt happy for him and congratulated him. Then he told me that she is a married woman! I tried not to act shocked but my mind was saying "Doh!!!??!?!??!" He saw my heartshaped pendant and asked where I bought it from because he wanted to buy one for the lady. He told the lady what if her husband asks where she got the pendant from? She replied that she'll just say she bought it herself. Doh!!???!?!?!? I was stumped.