My best wishes for a calm Puddy. so she can have her fluids, and a calm hand for her mama.

I know what you are going through, we were giving Malfi fluids a couple weeks ago, and it is so frustrating. Cat bag, two people, and still; needle out!

We try to syringe as much as we can in his mouth, in place of the SubQ's.

Try to look on the bright side: the sickest of cats will not have the strength to fight. So if she's resisting, she's doing better than you think.

And, if it is too mentally tough on you, just take her to the vet, and let them do it. My thought is: this is what money is for.
Maybe they will 'cut you a break' if you bring in your fluid bag and trappings.

Praying for the best results for Puddy girl.