Nothing.
We don't speak, and I firmly beleive it's for the best in my case. I moved my family in with him to "take care" of him. We lived there for 18 months. The biggest regret of my life. Since moving out, I don't speak with him.

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1992 500SEL 25K
1995 E320 40K
1995 SL600 120K
2002 JX8 Sport 43K
2005 Volvo S40 95K
2006 Isuzu NPR 304K (Frankencamper)
2007 Crown Victoria 150K
2014 Smart Electric 20K