What an odd request for this old friend to make, at such a time too.
I don't think I would agree to it, but it's entirely up to you and your family whether or not you do - and as others have said, if it's not sitting comfortably with you, then say No. You don't have to do anything you don't feel right about, just now. So go with your gut feelings on this.
And yes, I recognise the bit about not wanting to put medications and colostomy stuff away - my Dad was the same when my Mum died. She wasn't supposed to, as far as we knew - she was going into hospital because she potentially had another blockage - well yes, she did: a massive tumour but we didn't know until a week before she died. They didn't tell us, possibly on her instruction, because I was getting married - but a week after we got married, she had a near miss and they moved her to ICU, and then they told us. Shocked us rigid. Dad wanted her to come home, but she couldn't. It took a while before we were able to start clearing away the stuff - and even now, much of her stuff (toiletries etc.) is still in the house, although all the meds and supplies are gone.
Remember there is no "right" time to do anything - some people do it immediately, some never do it - and whichever you choose is fine for you. One day you'll just start, and that may be soon or it may not be - and that's ok.
(((hugs))) for you Ludoole - you're still in shock now, so take even more care of yourself than you normally would. 