AIBU to want to use my own birthday present?

[GlumyGloomer]

Light hearted
Dd (4yo) thinks that I am. Her birthday is one month before mine. MIL sent me a box of Lush stuff, all very sparkly and colourful, and I foolishly opened it in front of Dd. She is now alternating between begging to 'share' (take) my bath bombs, and insisting that it must be a late present for her. I already gave her one but the rest I quite fancy keeping for me. I ended up suggesting she use her birthday money to buy her own bath bombs, although I should probably be encouraging her to save it. I literally never spend money on pampering myself.
So, YABU: a grown woman does not need a fluorescent glittery bath. Let Dd have them and make sure she saves her money.
YANBU: a grown woman should not be nagged out of her present by her 4 year old. Dd can use her own money if she wants more and let it be a lesson in budgeting.
Also worth a note that usually Dd shares a bath with her 10 month old sister, whom I do not want covered in glitter, so letting Dd have them will generate extra work in terms of bathing them separately.

My son would be exactly the same as your daughter.

Buy her some cheap ones (I buy ones for him from Asda) and keep the fancy ones for yourself.

Thanks for all the replies.
To everyone saying share a bath; nope. I like my baths hot and quiet.
She has had little bath bombs before as a treat, but the eye popping size of the lush ones caused a lot of the excitement.
For the record I have no issues saying no to her if what she wants is not suitable/sentimental/something I need. I waver whenever it's something I know she'll enjoy as much as I would, and tbh I felt a bit silly defending my right to have a glittery purple bath, even if I do want one.
I think the bubble bath bar I'll break up and add to her star rewards menu, but the remaining bath bomb and shower bomb are mine.
I'll wait to see if she brings up using her birthday money to buy her own. It's not the worst thing she could want to do with it.

YANBU

It is your present.

And to PPs who suggested letting her get into the bath with you. My DS 'saves' his pees for the bath, so it would be a no from me 😂

@Daftodil
That's a great idea, she'd love that. Although I can see her presenting one to Dh and he hates baths

@Livpool
Oh no! We had our share of pee in bath episodes when she was younger but we're thankfully past that now. Mostly I won't bath with her because I hate tepid baths.