I see time and time again where the husband who cheated, is allowed to stay or is wanted back or is the poor bloke who couldn't resist temptation. The scorned wife spends all her emotional energy blaming and hating the OW.
Whilst, yes of course, the OW is morally in the wrong, but it is the DH who chose to have an affair. It is him and only him who can be blamed. Unless the OW is a close friend, she is a free agent and has not betrayed you. Yes, she shouldn't have got involved with someone who is not available, but she should not deserve all the vitriol normally dished out.
AIBU?