Leaving one's home during iddat

Q: I have a question regarding divorce and iddat. I was living in Quetta with my husband. Me and my husband came to Islamabad to get a divorce. I was divorced on the second September 2013. I am now living here at my parents home in Islamabad. Currently this is my second month of iddat, and there is no hope of reconciliation. One of my brothers lives in Lahore. He lives with my grandfather (dada abbu). He is getting married tomorrow. I wanted to ask if I can go to Lahore to attend my brother's wedding. Afterall he is my mahram and I will be living in my dada abbu's house. Am I allowed to go to my brother's wedding in Lahore during my iddat?

Living in Zina

Q: My sister is living unmarried with her non muslim boyfriend. Yesterday, she gave birth to his son. They named their Son Job. Now people start to congratulate me because of this. Saying Mubarak and so on.  I don't like to be congratulated by this occurring. Actually, I don't want to have anything to do with this. How should I react according to our Islamic adab? Furthermore, Should my parents do the aqiqa for this grandchild? Because my sister is not intending to do so. And is it legitimate for them, to give him an Islamic name?

Husband communicating with another women

Q: My husband is talking to another woman. I have seen his messages on his phone and it makes me very uncomfortable. He goes to see her and talks to her everyday. Once I confronted him and he accuses me of asking for a divorce. At times I struggle with this but then I remind myself Allah has a plan for and sabr is the key. This is not the first time he has done this but I forgave him every time but on this occasion I cannot get it out of my head. I say to myself Allah is all seeing all knowing and Allah will show him and better him. But this does not satisfy my feelings. Please help.