@GoblinGuy
Really? Are you sure? Been a while since I read that... dumpster fire of a chapter (chapters, actually), but if I remember correctly no actual... well... "penetration" happened. Pretty sure it was restricted to lighter stuff (comparatively; rape is never light), similar to what happened in Nadeshiko.
Unless you're talking about how long it took, in which case I completely agree. In Nadeshiko it was only a few pages; in Gal Cleaning we had CHAPTERS. Wolf Guy flashbacks right there (though Wolf Guy was way way way way waaaaaaaaaaaaaaaaaaaaaaay worse; if you don't know what I'm talking about, be grateful and try to keep it that way).
As for the mom thing... I agree. Completely. I was really looking forward to it. Her character design was also my favorite, despite the fact she appeared so little. On the other hand, I'd feel a little sad for the dad, considering he seemed like a really nice guy, but... let's face it, we weren't reading it for the characters or even for the story. Doesn't really matter how the dad feels. There should've been a chapter (better yet, chapters, with hopefully a fivesome thrown in, with the three sisters, step-mom, and mc) dedicated to the step-mom. If the author wasn't going to include her in the harem, he shouldn't have designed her like
that in the first place (I mean, if it was a real, solid story then there wouldn't be issues (it'd in fact serve as explanation for how buxom the daughters are), but we all know it was hentai, even if others may claim otherwise and even if it wasn't classified as such). The way it was done was just mean. An injustice.