To not see my husbands (adult) son! His behavior is that of a liar, and of ripping people off. I don't care for it and won't subject myself to people who behave in this manner.

I told my husband my position and he completely understands. Sadly though, my husband is also on the outs with his son (this is not due to any influence on my part I want him to have a healthy relationship with his family and spend time with them). However, dysfunctional dynamics are hard to overcome and I can see those patterns in his family clearly. It is very sad as I come from relatively healthy dynamics (heck, my sister lives with my spouse and I and we all get along nicely).