WIBU to be petty?

[Riverside85]

Exh was due to have DD (5yo) on Friday night. She has dance class Saturday morning. We were messaging today about the arrangements and I said about picking up her dance shoes and stuff, but he said he won’t be able to take DD to dance class because... his new gf (of 8 months) has a hair appointment and he’s looking after her two kids (DD would be there too at their house with them).

So now I’m keeping DD Friday night to take her dancing Saturday morning and they’re collecting her at lunchtime.

Would I be unreasonable or (WIBP would I be petty) to say, “Oooh your hair looks lovely” to her when they collect? (Totally lighthearted, I could actually say it )

I don't see what the point would be.

I’d tell her it looks shit in those circumstances

How depressing of your ex to prioritise his girlfriends hair over your daughter.

I don't understand - is this a PA way of making a snide comment? why do you need to do that ?

Typo at the end of my post- I could never actually say it!

Well your issue is your ex not his gf so yeah YABU.

Oh I know I know, it’s a passive aggressive thought and yes, it’s him not her. Don’t worry I will stand at the door with a smile plastered on my face while I wave DD off

She's not the one being a dick, he is. For all we know she has no idea your DD has a dance class.

He sounds like a shit.

For what purpose?

Nah... I’d sarcastically say “Oh sorry, I’m confused?! I thought you were going to the hairdressers this morning?” and look for a few seconds too long at her hair 😂
But then again that’s me.

Why on earth can’t he take her kids with him to drop off DD at the dance lesson? Or if that’s not possible then she should be either rearranging her appointment or finding alternative childcare.

No what you should sAy is

Is that you on your way to get your hair done?

That would be mega bitchy.

But your ex is being a twat, his Dd should be a priority.

I don't understand. I think if you did this to me I'd say thanks and miss whatever point you're trying to make.

Why would you be a dick to her?

As people are rightly saying it isn’t her fault and I shouldn’t be a dick to her, what (fantasy) suitably passive aggressive comment could I make to him instead (definitely fantasy and will not actually say anything!)