The mother of a child who's father has remarried is still their mother!

[Clymene]

I've just been listening to You and Yours on Radio 4 about step families and TWO of the step mothers are referring to the mothers of their step-children as their 'biological mothers'.

NO. They are their mothers, full stop. They don't require the pre-fix biological.

When did this become a thing?

Clymene and if you read my post, that's why I said usually.

My dad remarried when I was 35. I never called his new wife step mother as she wasn’t my mother. She was my dad’s wife.

hoping sorry not to be clear, I disagree with another person in a child's life not being able to parent if they already have 2 good parents already. You said you do not parent your DSC as they are parented well already. I disagree- my DC are parented very well by all 3 of us- their step father ( my DP) too. You have much to offer your DSC as parenting takes many forms in many ways. Don't think your good relationship with them is not parenting, because it is and will be I'm sure.

Whether you liked her on not, if she was your dad"s wife she was your stepmother. I am vey close to my stepdaughters and they call me by my first name but they are not going to stop referring to me as their stepmother to others...