Mom's past on. Daddy's worth a $billion. Guess what comes next....
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And when Daddy passes on, sister (or brother) could then marry another sibling...our cousin, and so on. All they have to do is say they love each other and want to marry.
What's to stop that from becoming a reality now?
The federal government has a vast bureaucracy devoted to challenging fake heterosexual marriages in the context of immigration. Nothing at all keeping the IRS, SSA or VA from challenging fake gay marriages in the context of estate tax, survivor benefits, etc.
Every geezer in the US whose getting $1200 in SSI every month will get to pass that on past their death in perpetuity. Either that or the IRS or some other agency now gets to decide whats a “real” marriage. Oh, and if amnesty gets past the House, every illigal alien here gets to bring their “gay hombre” from back home.