Here is yet another story of an attorney having (or trying to have) sex with a client's spouse. In this case, the Indiana Supreme Court suspended an attorney for 90 days. The attorney sent the client's wife a series of e-mails in which the attorney discussed the attorney's romantic interest in the wife. The court affirmed findings that the attorney had breached his duty of confidentiality and engaged in a conflict of interest. The case is called In The Matter of Fillenwarth and you can read it here.
For the other stories involving attorneys and their client's spouses go here, here, here and here.