Q: Can Allah forgive a person who has committed blasphemy even being a Muslim?

Q: There's a thing that is troubling me a lot. I'm a person who has not much knowledge of Deen and is also stricken with waswas. My waswas were in the form of really complicated questions, about Allah's attributes, whether something is in Quran/Hadith or not, whether this thing is attributed to the Holy Prophet (Sallallahu Alaihi Wasallam) or not etc. I used to note these down in my phone so that I'd ask someone about these, and that caused the questions to increase that I have this answer in my mind, what if I have done kufr. Then I used to say that Ya Allah if any of this is kufr, forgive me. Is that the right thing to do? Also should I delete all these questions from my phone or seek answers for them in case I have unknowingly done kufr?

Q: I was at a restaurant with my brother and two boys were staring at us. While leaving, I went to them and told them to feel ashamed as they are staring like this. Did I commit a sin? What should I have done? How can I ask for forgiveness from Allah?

Q: I have recently started a part time make up course so that I can start earning money to help with expenses for my husband and kids. I have already spent money on the course and on buying the necessary things to do make up for other clients but I realized that it may not be permissible to do make up for others.

1. Would I get the sin for doing make up for women who then go without hijab to functions or mix with non mahrams? Will my income be haraam?

2. Also are we allowed to use stick on synthetic lashes for women who request so? If I had realized earlier I would not have invested in this course and the make up needed

Q: Is it necessary to perform wudhu after smoking a cigarette or wudhu will not break?

Q:

1. Will husband and wife be together in jannah?

2. Which husband will the wife be with if she had more than one husband?

Q: Sometimes I secretly replace my wife's money from her purse with a bigger amount. For example, if she had R50, I take the R50 for myself and replace it with a R100 without her knowing in order to surprise her. When she comes to know of a bigger amount, I lie to her and tell her it was miracle that took place from the side of Allah. It really pleases her when she hears stuff like this, miracles etc. 

My questions are:

1. Am I guilty of the sin of lying?

2. By me replacing her money with a larger amount, is this regarded as Ribaa?

Q: I just wanted to know if a teacher of a school is handing out assignments to a kid and by accident she puts one of the coming up test in that portfolio, if the kid practices that test paper (e.g. works on the maths sums) before the test so they know how to do it, is it haraam?

Q: Is it permissible to use braces on one's teeth to align the teeth and make it straight?

Q: My wife is a revert Muslimah masha Allah and she prays salah daily. Her parents are not Muslims and we do not live with them. Her parents have two dogs. I know that dogs are najis and haram. My question is that her parents are going to England for 5 days and they asked my wife to be in their home for 5 days because nobody is there to look after their dog by giving it food etc. My wife asked me if we can stay in their home for 5 days. The dog lives inside their home so what I should do?