I love my sister, and mostly I care about what she has to say.
But she is on a baking frenzy. She bakes 5-8 full celebration cakes per week, plus cupcakes and brownies, to fund her dds trip to Cern with her physics class (A level physics)
Every phone call is at least 20 minutes of what sponge raised, which one did not, Italian cream cakes, French fruit tarts, various ways of making chocolate cake, icing, and how they have been decorated. The joys of cheesecake, the perfect pouring of jelly over fruit tarts and on and on!
There is no stopping her, and frankly, calling Spain to be regaled with cakes I cannot taste, is boring, and not to mention expensive.
I dont want to seem supportive, but come on this is likely to continue till the end of summer term!
The other issue is that she has decided to build a kitchen in an old bedroom upstairs in my dads house. There is space, the top floor is currently three bedrooms, a sitting room, a toilet with a sink. One of the bedrooms has a sink, so plumbing, and she is going to spend 5k on installing a kitchen, plus plumber, electrician, plus a joiner to actually install the kitchen. All the prep work is going to take place prior to her getting home in June. So, everything but the actual kitchen install.
She has not even emptied the room in question. There is furniture there, a large side unit filled with dinner sets, glasses etc.
A built in wardrobe has had to be knocked out, make good work on the wall, ceiling, and floor.
She has left our 86 year old dad, who is in a wheelchair, and cant even go up there, in charge.
She has decided the walls are to be painted blue and pink. My dad is aghast, he says it is still my house, Magnolia or cream will have to do! He does not want to send his mate out sourcing the right pink and blue.
And why is she doing this? Her daughter is moving there to study, so needs a decent kitchen. She says she must have the best cooker possible as she loves to bake brownies. My dad is saying no way am I installing cabling for induction tops.
Yes, you have guessed it. My sister is expecting dad to pay for the kitchen. She has said straight out that she is not comfortable with spending money to upgrade a house that is not hers. She can pay the white goods, but nothing else. 
I have tried reason with her. I have told her she cannot expect dad to fund this kitchen, just so that her daughter can live there RENT FREE.
But she thinks it is her duty as a grand dad to support her daughter.
My dad is sad and disappointed and feels taken advantage of.
I am angry because she has the money she just does not want to spend her own money. She does not even want to pay for a ticket to go up there and sort it out. It has to start happening NOW, as if they start in June when she gets there, the first couple of weeks of her dds uni might be "disturbed" by building noise. I have said her dd is perfectly able to use the vast library to study and wont have to be inconvenienced.
I am so sick of this navel gazing, how important it is that they are not inconvenienced, and that they save money.
How on earth can I make her see sense, and stop laying problem on my dads doorstep, quite literally?