There is a potential sexual encounter with Matt in the new update, but not a full sex scene yet. The next story update will let you take that relationship even further.
When will the update be released?
It's in early access now on Patreon and will be posted here as a free release on 7 January.
Oh, I meant an update that included a sex scene with Matt.
Gotcha. I don't know when it will release yet. The next update will be for a new Grind'm scenario, and the story update with Matt will be after that.