If I remember correctly he was divorced. Not sure if he got divorced first and then pursued the affair or the affair contributed to the divorce. The affair and the craptastic failure that was the team concept did lead to him being pushed out as CEO.
There is a school of thought that the hardline taken by the company later in 97 was partly due to a feeling of betrayal by the IBT when they actively sought to get the team concept to fail which helped the zero improvement in service and cost the company hundreds of millions.
Personally, I don't subscribe to that line of reasoning.
However, I am quite certain the team concept was in no way a secret plan to grab the pension. Ironically, that would come years later in a horse trade for organizing Overnight/UPS freight which helped destroy that outfit and wounnd up costing the company billions... Thanks IBT!
(OK, that one was certainly not all on the IBT, I'm just jerking your chain on that one)