This woman is 21 years older than your husband. It sounds like she is more motherly with him kinda friend. Maybe she just was a "friendly" person who noticed him and he liked that about this customer too. Plus not only is she so much older but she is also married too. Did you husband have any other friends? I am wondering about that considering he was staying at home for so many years. Maybe she just boosted his self esteem and he looked forward to talking to her because of that.