I tried this but in a different way because I remembered that Viv could go to parties alone.
I tried to avoid Des but if I didn’t invite mom to the party then Viv always invited Des(This prevents Viv from going to the party alone)
So options what i get:
Viv+Des+Eva
Viv+Mom+Eva
Viv+Des
Not Viv alone or only with Eva.
If I remember right but there was some pictures of the rebeca scene in previous update* what we couldn’t play then.
I don't remember now a hint of any Des and drugs in this update.
Maybe you need to be a bad friend to Des and then start partying with drugs... my quess.
(Bad RP with Des?)
Edit
*Meaning this post:
https://f95zone.to/threads/dog-days-of-summer-v0-3-8-beta-blackweb-games.43621/page-34#post-3607461
If I understood correctly then there were already Rebeca scene pictures in the folder.