This is cute and all... I've only read a few chapters, but I just can't shake the feeling that a core part of the humor of this series (ie, at the expense of Takuya) is kind of needlessly mean-spirited. I definitely like all the cutesy yuri between the girl and the mom. But I'm not sure if I can stick with this if it just continues to be like "haha, the girl that you have a crush on is just using you to get to your mother!" That just strikes me a cruel.
I don't find it funny when bad things happen to decent people, and this just seems like the story is exploiting the son's feelings all for the sake of a running gag. I remembered a manga on this site I read several years ago that depicted a similar situation (I think it was called "Girl x Girl x Boy"). It ended with the two girls getting together, and the girl that the male student is in love with telling him he's a good person and that she knows he'll have no trouble finding someone in the future who will love him back. But then, that was more of a dramatic comedy.
TBH, I really just don't know. Maybe I'm just overthinking this... I'd love to get any feedback, to know if I'm missing the point or if I'm being out of line with this comment, or if there's anything to my rambling thoughts.