From what I understand, no. The only NSFW stuff they're going to do is a stand-alone moment that takes place shortly after Step 3, which will only be available on Patreon.
Viewing post in Step 4 Cove Preview! Happy 5,000 Followers comments
They said that they wanted all public and more accessible things about Our Life to be sfw, so the nsfw version will only be downloadable through a patreon membership instead of steam or itch. When it comes out you can just join the $5 tier and pay up front like you would for a dlc, download it, then cancel your membership any time between that and the 1st of the next month. The 1st of every month is when patreon charges you again for your memberships, even if it hasn’t been 30 days since you’ve joined a tier.