Had the post read something along the lines of...
Story about inviting (rudely) other people over to the OP's house....etc etc. And then a footnote as to "I don't think it's that the in-laws home is too small to host their own parties, and the house could accomodate having people over", it'd be one thing.
But, to start out the post in this way, "My in-laws have a huge home, but they never entertain. They invite us over for the holidays and such, but NOBODY outside the immediate family has ever stepped foot into the house (weird)." is wrong.
It is, as I've said, not, somehow, a huge house owner's responsibility to host a party because they have a "huge home." The size of their home does not mean that they are, because of the size, obligated to host parties. NEITHER is it "weird" that they don't have others in their home just because it happens to be a "huge home."
While I can see what the 2 of you are trying to say, the fact remains that the point is lost when trying to assert that "My in-laws have a huge home, but they never entertain."
I'm completely with you on the fact that in-laws should not be inviting other people into the OP's home. I'm completely with you in that reciprocating invitations is etiquettely proper (and, that could also be taking the OP out to dinner rather than hosting a party in their home, by the way). I'm completely with you on the etiquette violations within the post.
Had that not been the initial comment of the poster and had it been a sidenote explanation of why they may have room after all, it'd be one thing. But, as it stands, the post starts out by saying somehow implying that a huge home means they should entertain and that they are "weird" for not doing so.
Again, as I have said several times now, the OP may have not, in any way, meant to imply what's coming across. And, I hope that, if this is the case, she reconsiders how she phrased what she said and corrects it.
And, understand that I do get what the 2 of you are saying. I do. But, that's not how it's coming across at the moment. Do you see what I'm saying here?
Edited to italicize a paragraph. I fear that this point must be getting lost in the shuffle and that you might be missing it. Hoping the italics helps in that.