WIBU to ask you for a completely selfish handhold, re: organising SILs Baby shower whilst struggling with fertility

[FlamingoPrincess1212]

So, uber fertile sil never wanted kids, and accidentally got pregnant. (This is her second and she's expecting twins!)
All fine I'm mega pleased, I do actually love her, but I'll admit I've been trying to keep a little more distance for my own mental health.
But recently I've been tasked with organising a baby shower I disagree with these weird grabby americanisms anyway but that's not why I am here and I don't know if I can do it.
This will be her 2nd and 3rd accidental child in the time that DH and I have been having regular deliberate unprotected sex, and if I'm honest it hurts.
Furthermore,
Her friends are flakey as hell, so family will be a big part of the core guest list, meaning I'll have to stay all day in a very baby focused environment.
Organising this party is a very blatant reminder that I am not pregnant and I feel like I'm failing as a woman. I feel like I'm not a real woman.
DH isn't on the same page when it comes to envy and others children, and manages to not get so upset by it all, and he really wants SIl to have the "party she deserves after a shitty year" so he's being a bit clueless here imo.
I know I can't say anything, and I can't refuse, I know it would be selfish to do anything but go ahead and organise and attend the shower and that I can't make DSils big day about me.
But could I please ask you all for a little hand hold, so I don't feel so alone, like a little less of a failure as a woman, and like less of an awful friend/sil.
thanks

littleraincloud maybe sil could throw me a baby shower? Lol 🙈

Anyone else now really hoping they don't have twins??

coffee I am!!
I'm a twin,
My Dsis had a twin who mum unfortunately lost.
Mum is a twin
Auntie Gina was a twin and had twins
Gran is a twin
Mil is a twin.

I was having a breakdown to DH last night when sil called!!

Hence why I've got the early scan!

To be fair, I had twins. It is becoming more known to stave off labour if one has arrived and the other hasn't yet been born if they're particularly early. The record was, I think 87 days .

Mine were born 36+5, twin 1 arrived in a hurry. Twin 2 was much more comfy! After realising my contractions had stopped dead, dt2 was stuck, possibly struggling (trace kept dropping) and the consultant's hand didn't move him (images of James Herriot with his arm up a cow are appropriate here), I ended up with a crash section. So one twin vaginally and one via c section.

It was still one of the most awesome experiences I've ever had, only tied with ds1's unattended arrival. So take nothing of labour from my stories except that however it happens, its bloody amazing.