If you haven't read it, another take on Lex's will is in Nan Smith's wedding series. I think the will is explained towards the end of Wedding Consequences, and its final disposition during the last story, Wedding Accomplished.
The links in the Nan Smith Series guide are outdated and don't redirect to the current URLs. So, I'm posting them here.
In order they're:
Wedding DayWedding AftermathWedding ConsequencesWedding Rearrangement Wedding Accomplished