My Regular Pioneer ex-girlfriend, was boinking some brother for at least 3 months. I flew out to Cali every other week, and talked to her nearly everyday, and never knew. I should have seen this coming, as she sent me a full-body nude shot when we first started dating,but I can be oblivious at times. When I told a friend, he actually made up some BS reason as for why it could have been a mistake.
I had my other signs. But didn't see them all until it was too late.