anybody can put anybody else in his/her will, NOTHING prevented these people from executing wills, powers of attorney or anything else required for estate planning.
only a surviving spouse can inherit an estate in Pennsylvania without paying a significant tax bite...thus, same sex ‘marriage’...
No such thing in Texas - we basically don’t have inheritance taxes unless the estate exceeds the federal estate tax threshhold (currently between $5m and $15m, depending on circumstances).