He's said on streams that he plans to end 'season 1' right after the incest arrest, and only continue it a year later. It's so he can take a break, work on other docs and his Sonichu animated series (and presumably parenting), and so there's time for more context to come out about the jail saga, Flutter, etc.
That being said, the ending of this one really gives me the impression that it's the penultimate or antepenultimate episode. It basically ends with a post where Chris recaps and reflects on his entire life, followed by Geno doing the same. Next episode is definitely getting to the point where Chris starts fucking Barb since we're at June 1 now, and depending on how succinct/drawn out it is, it may or may not get to the arrest.