I had to do this to DNiece at the weekend (aged 3). It's been a manic few weeks, I had to work unexpectedly on Friday as DD was sick earlier in the week, and DH was in charge of packing up at home.
He DID take a birthday card from my drawer, but a cheap horrible one that I have for emergencies. I have quite a few "age" ones in there, including pretty much at least 1 for each age for a girl, and plenty of ages of boys too. He also took a not so nice card for his DSis, but then didn't even write that to leave at MILs, as DSis stayed in her own house for a change (she's been coming home most weekends to help MIL as UncleIL is in hospital - so stayed in her own house for her birthday with her DFiance).
He also completely forgot to bet out birthday wrap, and didn't tell me until after we'd been out on Saturday morning. But we needed to give the present before we went out again (to buy a phone sim card for Uncle, visit hospital, and get home to grab DD before heading to see my parents and have my DF criticize (with much love and caring - but still pull my efforts to ribbons) my promotion application form, have dinner, drive home and fall into bed before heading back home in time to get to school fair).
I had Christmas wrap with me to finish wrapping the last of the presents we needed to leave in my parents and PILs houses as we won't be down again before Christmas.
I know it wasn't nice of me, and SIL will definitely lay it at my feet, but I also know that DNiece was darn lucky to get a present given the manic time I am having.
DD's birthday is on Boxing Day - and she gets quite a variety of presents and wrappings. Some joint presents for both, some individual for each (and occasionally even on the right days!), and some give nothing at all. And there is a variety of wrappings too - some joint are Christmas wrapped, some joint are birthday wrapped, some individual are Christmas wrapped regardless of Xmas/birthday, and some are actually wrapped in the correct type. She doesn't give a fiddlers about any distinction - she's delighted to get any gift from any person. TG.