Incorrect vow

Q: A person vowed that if he never changes his school, he will stop smoking. He has not changed his school till now but he has smoked many times in this time. Does he have to offer expiation and how many?

First wife requesting a divorce

Q: My first wife has said to me that if I go abroad to meet my second wife then I must give her (my first wife) divorce first. She is already living in a separate room from mine. She has had many outbursts before. The latest outburst came when she saw my passport. I have pleaded with and asked her in every way to be patient for the sake of the kids, but it seems that she does not see anyone besides herself. I have talked to her father but he has given up also and there is no one further I can ask to interfere and bring some kind of reconciliation between us. I do not want to divorce anyone.

Using a stone or baked brick for tayammum

Q: My mother is 70 years old...she is suffering from pollen allergy but the allergy is not restricted to only pollen months (feb-march-april)...The problem is the allergy continues through out the year. She is now even allergic to dust, water etc. The problem increases in winter as soon as she wakes up for fajar and does wudu. She starts coughing sneezing etc. and the same applies for all the prayers. Due to her age, when she coughs, some times urine drops leak out...then she has to go to washroom, do paaki, do wudu again and the problem increases further due to all this.. Again she has to do wudu and coughing etc. Her age does not permit to go through all this process again and again. So someone advised to do tayyamum especially for magrib and isha when she has the peak of allergy. My question is from where to get the paak soil for tayymum? We have a park in front of our home but many animals even pigs roam around there. We can't use that soil and the walls are all painted..no dust on them. What to do?