Been with DP 18 months. Don't live together (yet).
Just on the 'phone to MIL (who is, in all other matters, absolutely lovely, btw) and she asked me, with reference to our upcoming holiday, if I have packed DP's suitcase yet.
I naturally tried to laugh it off, but she was deadly serious.
I pointed out that I will be packing for myself and my 6 yo child, but that DP will be expected to assemble his own holiday wardrobe.
She reasoned that this state of affairs would inevitably lead to his forgetting something vitally important.
I argued that he'd just have to go to the nearest town and buy another.
I'm not sure I convinced her that this was reasonable, but I think at least it's now fairly clear that this is how it will be.
It's worth noting that DP has at no point expressed any wish for me to pack for him... but I am starting to see why he finds his DM a bit smothering.