>> it was to rein in nancy's spending that he put her on a cash allowance. >> how much cash? >> at least $300. >> but nancy said brad was angry that they didn't have more money to spend. >> she referred to me as the budget nazi. i'm sure she's said that once or twice in a heated conversation. >> the other issue? brad's sexual relationship with nancy's best friend heather. the issue which finally brought their marriage to an end. he called it his indiscretion. >> i had sexual intercourse with heather once. >> it happened some time at the end of 2004, 2005, he said. >> and where did this sexual intercourse take place? >> it took place in our home in the closet of the master bedroom. >> did you initially deny the relationship? >> yes, i initially denied it for approximately one year. >> why? >> i thought that if -- by denying it, it would go away and we could remain as a whole family.