New family vocabulary

In my last post I said we need new vocabulary for in vitro kids for:

  • my mom that carried me for 9 months
  • my mom who donated an egg
  • my dad who donated sperm
  • etc

Well, we also need new vocabulary terms for all the new extended families out there:

  • my husband’s ex (how are you supposed to introduce her?)
  • my step-grandmother (is that your stepmom’s mother or your grandfather’s new wife?)
  • my half brother’s cousin
  • my half brother’s stepbrother

What other terms can you think of?  How do you deal with them?