To think this is different

[Bombshell101]

My DP wants me to love her DD the same as I do my DS.
I came into her DD life 18 months ago. It hasn't been an easy ride. She's at preteen age now so hormones are all over the show so she can be quite rude to me. Which fine isn't entirely her fault but she can push boundaries and be quite mean.

Anyway my DP thinks I should love her exactly the same as my DS otherwise we can't ge together. I don't feel this way about her loving my DS the same as I understand it is different. I tell her DD I love her and praise her up and say she's a kind person etc. I include her DD and have looked after her when I'll. But it's not the same love.
Aibu?

Dies she measure your love some how every day like weight or height?
It’s so ridiculous. She can’t expect this. The other stepmum is longer in child’s life and knows her better of course she looks more natural, but being natural doesn’t mean to love the same as your own children either.

I know but no matter how I try to explain she takes offence that I don't love her DD the same