You may think that your Aunt Jess is ten times more fun than your Uncle Ray while your brother's daughter is much better behaved than your sister's son, but you'd never dare verbalise those thoughts would you?
So, why do our partners think that comparing us to their mums is acceptable, even when they think they're doing a subtle job of it?
Here are just ten times we knew, in no uncertain terms, that at that moment they'd rather have their mums around than us.
1. That time they expressed surprised we didn't carry a handy book of stamps in our handbags.
We don't carry lavender perfume in there either, love.
2. That time we made our first Sunday roast and they made a big production of swallowing lumpy mash.
Oh I'm sorry I spent money on a nice bottle of wine instead of a top-of-the-line masher. Forgive me?
3. That time we couldn't get the baby to stop crying within thirty seconds.
No, I don't know the words to the song your mum used sing your younger sister. Do you?
4. That time we admitted we weren't that big into baking. Never have been, never will be.
Be sure to come back from your mum's with a slice of Victoria sponge for me, won't you?
5. That time they held onto the car door handle for dear life when we took a corner a little swiftly to ensure we didn't miss Game of Thrones.
You might want to tell your mum she can hit 30 mph from time to time and still stay on the right side of the law.
6. That time we suggested your 'flu' has less to do with the weather and more to do with your lad's night out the evening before.
No, I will not stroke your forehead.
7. That time we jokingly lamented the fact we still struggle to change a light bulb.
Well excuse me for not carrying a tool-belt as part of my daily ensemble.
8. That time we laughed at your choice of work-out gear.
I'm sure your mum did say it looked great, but she did buy it for you, after all.
9. That time they laughed at how much time we spent getting ready for a night out.
No worries hun, I'll just start dressing like your mother. Pass the bejewelled cardigan, sir.
10. That time they jokingly questioned why the house couldn't be as neat as their mum's.
I'm afraid she doesn't have an addiction to House of Cards, now pipe down, you're talking over it.