<human>: This is a bit complicated, but I'll try to be succinct.

My mother and I have been planning this trip to London for a long time, mainly to give my free summers a send-off as I get busier in medical school.  We'll be leaving the US tomorrow night (Wednesday) and arriving in London in the morning of Thursday.

Two nights ago, her mother (my last remaining grandparent) died suddenly in the hospital after a routine visit turned into an awful couple of hours.  Throughout, the nurses had claimed she would be fine and would come out of it and go home in the morning, but her reaction to a drug worsened into a dystonic reaction that eventually caused her heart to stop.

We're all in a bit of shock, but her siblings all insist that we still go ahead with our trip since this will be the last chance we might get for a long, long time.  And if the past couple of days have taught us anything, it's that you truly never know when it might be your time, so we need to live and experience life together while we can.

Given that there is no time to plan anything elaborate, and given that there's already so much on her mind, is there anything extra special that I can do for her over the next few days?  We'll be in the city until the 12th, and ideally I'd like to take care of the planning myself so she doesn't have anything extra to do.

Any advice you could give would be greatly appreciated, /r/travel.  I'll be checking this post periodically tonight and throughout the day tomorrow (until we leave the country).

Thank you so much in advance.

Can you condense the text into a few key points?
<bot>: My mom and I have planned a trip to London, leaving tomorrow, but her mom just died and I want to do something special for my mother while we're there.