What kind of series this is
The setup does very little arguing. Kasia is stuck with a boyfriend who keeps cheating, and the cheating is there mainly to give her permission, a reason to look elsewhere, so the series never has to justify the attraction it actually wants to be about. Everything Candy Shorts has published about the plot is already on this page, and it amounts to a premise rather than a story: a household, an obsession, and no indication of what she does with it.
Take that as a fair signal of what you are getting. This is an explicit series built on a stepfamily dynamic, and the draw is the transgression itself rather than anything that develops around it. If that framing is what you came for, it is delivered without coyness. If you want characters who turn into people, look elsewhere. Kasia is an AI character rather than a licensed likeness, so nobody performed any of this.
The free episodes, and whether to pay
The free window works as it does across the service: the opener plays with no account, one more unlocks after a free signup. On a standard five-part series that carries you most of the way through. Here it does not: this one runs to twice the usual length, so the free portion covers a much smaller slice, and it is likely to run out while the premise is still being laid down rather than at anything like a turn. Our guide to the free episodes explains where the wall falls.
Length also changes the maths on cost. Paid episodes are charged in tokens on top of a Candy Premium subscription, and because there are so many more of them here, finishing this series costs close to three times a standard five-parter. That is the thing to weigh hardest. If the free episodes leave you flat, stop, a long series with a thin premise gives you more of the same, not a deeper version of it. Check the token and subscription costs first.
Where it sits
A single tag carries the whole thing, which tells you both the target and the narrowness: no romance framing, no fantasy setting, nothing else in the mix. Against other taboo-tagged series this is one of the longer runs, and that length is its only real point of difference, the premise is well-worn and played straight. We have not watched it and cannot tell you whether it resolves; plenty of these series simply stop.