On what facts do you presume that Armstrong ISN'T there for his kids other than being away on business for a month unlike military fathers deployed for a year or so?
This year is likely his last successful year of gainful employment due to his age vs. occupation with the possibility of a decent income next year under the sponsorship of the Discovery Channel. What is he going to do then? Once the racing stops so do the endorsements! His livelihood, his family's support and future income depend on what he is doing TODAY! He and the other athletes of his calibre know full well what they are doing and sacrificing and it is up to their spouses to realize that. Don't forget, these women married these athletes knowing full well what their short lived jobs entail........
Since you and I have no knowledge of the circumstances surrounding his personal life, you and I have no right to cast judgment on Armstrong. But if you wish to push the envelope, then I offer the argument that his ex was merely a gold digger latching on to a professional athlete and ultimately couldn't deal with the fact that she came in second...........
No excuse for cheating.