That title is about as clear as mud, apologies! Also I know IABU as I'm posting here for traffic 
Currently pg with my first child and starting to think about what he will call our parents and I am a bit stuck on what to suggest for dp step mum. She is honestly lovely and we are both keen for her to have an active role in our DC life (if she wants to of course)
Is there a 'go to' name for step grand parents? I really don't want to offend dp mum or make his step mum feel uncomfortable.
Probably overthinking this but just want everyone to be happy! Any suggestions will be most welcome!
TIA!