Her defense? They drove her to it. By sleeping in their own bed in their own home before sunrise on a Sunday morning. I can see why she felt threatened.
There is no evidence of any abuse at the hands of ex-husband Dan. There is however, record of the $9,000/month he gave her. Even though she had relinquished custody of their children to him. With inflation, that's $18,900/month in today's dollars ... or $228,000/year. All for herself (remember, he had their kids.) In exchange, all he wanted was to be left alone. He took out restraining orders against Betty and she violated each and every once, once driving her Suburban (paid for by Dan) through his front door.
Believe it or not, there are women out there who don't revile Betty. They sympathize with and idolize her! Betty is big on jailhouse interviews and loves answering her "fan mail." Shudder.