The only EDU acronym I know of is as mentioned.
''Yeah, I've written her a letter just rambling about normal things and saying she's ok, I've enclosed a note saying as I can't include grapes/flowers in the envelope then she could have a day out and a meal with me if she wanted when she's well? Do you reckon I should take that out as it might seem unsensitive?''
Doesn't seem insensitive but I don't know how she'd take it, maybe just say something like it'd be nice to do something fun together when she gets better?