A/N I probably need to lay this out before someone thinks the story is getting weird.
1. Mark and Elizabeth are not related by blood nor were they raised together...so their relationship is legal and ethical.
2. Emily and Marie are Marks half sisters Rory is their mother
3. Emily and Marie are Elizabeth's half sisters Dean is their father.
4. Danny is Elizabeth's half brother same mother
Lindsay and Dean Rory and Dean Rory and UNK Lindsay and George
Elizabeth Marie , Emily Mark Danny