I call it "woman in house syndrome"
My DH lived on his own and cooked and cleaned and did his own laundry...we move in together, and then....yep, I do all those things, for both of us, and now for DD, her reasonable excuse being, she is 4.
I did remind him he was a lazy arse, and he said "but I do appreciate you darling".
The lack of recognition is really hard I think, no one says "hey, you got the house so clean while you had morning sickness AND still had time to worm the cat!". Generally you get "you forgot to pick up the dry cleaning!" so the only feedback is by omission, never what you got right.
Similarly, no one else ever thinks about toilet paper...till it runs out.
All mothers are working mother, although some are in paid employment and some aren't.
But if you have a DH or children with a tendency to be lazy and have someone else look after them, well, they're not going to stop you are they?
However, I refuse absolutely to organise the MIL birthday card. He does that, and the mothers day flowers, although they are generally done on an "oh shit! Better send some flowers, who does them last minute???" basis.
I also refuse to pack his suitcase for him when he goes on business trips...then when he comes home I stand over him while he empties the dirty stuff into the laundry basket as I will not have a repeat of picking up the suitcase and finding 6 month old mouldy clothes in it!!!!!
Aggravatign though this behaviour undoubtedly is, I prefer it to my friends (now ex) husband, who would come in, inspect the house for dust, comment on how well (or not) she had her makeup on and complain the dishwasher was stacked incorrectly and make her restack it.
There must be a happy medium, it is just hard work getting there!
My friend writes down a list for her DH to do and he trots off and happily does them. It would never occur to him spontaneaously to do these things as I think a lot of men are blind to household tasks.