I am a woman who has six sisters-in-law. That’s a lot of sisters-in-law. I owe this bounty to the fact that my husband is the youngest of eight siblings. And my own brother isn’t even married yet, so hopefully, someday I will be able to say that I have seven sisters-in-law. It is really important that I someday have seven sisters-in-law, because my poor mother should be able to say that she has one singular daughter-in-law. Her singular son-in-law, joyously obtained ten years ago, just isn’t enough anymore. A wedding is in order! And don’t get her started on her lack of grandchildren (no grammatical issue here to discuss, just general acknowledgement of her obscene dearth of grandchildren).
I think because of my abundance of sisters-in-law, it has always bothered me when people say sister-in-laws when they mean the plural of sister-in-law. I do, however, get a little bit of joy in pondering what a sister-in-laws would mean. Is it a sister bond that is so strong that it encompasses all laws? A sister connection that went all the way to the supreme court? A policewoman whose sister is a sheriff? Nope. It’s just a bunch of grammatically incorrect but wonderful husband’s sisters and husband’s brothers’ wives. Phew, I really had to think about the possessive rules for that last sentence. Happy Football Sunday to all and Go Chargers (for my San Diego-based sisters-in-law)!