There's actually already a mod for that (along with other things) that you can find right here on itch.It's called Lust Doll Essentials.
Take caution if you turn on No-Clip though. I've already found a place where using it will get you softlocked.
can you provide the link?
Searching for "Lust Doll Essentials" puts it right at the top of the results, but:
https://lustdolllover.itch.io/lust-doll-essentials
You can, but none of the game really accounts for you having such big ones, so it might be jarring