Keeping a distance from one's sister

Q: I have an elder sister. She is not a good woman. She is a woman with bad character. She is married but had many affairs outside marriage. She is always in modern clothes and not Deeni at all. She just wants to trick men and sleep with them. I hate her. She also does gossiping about me to my friends. I am planning to get married soon. I fear that if she meets my husband she will try to tempt him and fill his ears against him. So, I want to stop talking to her so that she does not interfere in my married life. Can I do that? Can I stay away from her to protect my marriage?

The Ka'bah Shareef

Q:

1. Who made the kabah first? Was it the angels or hazrat Adam (Alayhis Salaam) and was it uplifted or demolished in the flood in the time of Nuh (Alayhis Salaam)? And when the quraish build the kabah did the prophet saw put the hajar Aswad in?

2 If the kabah was made before hazrat ibraheem (Alayhis Salaam) why is there a special mention of ibraheem (Alayhis Salaam) and his beloved son that made the kabah

3. All prophets gave dawah of tawheed. Why has ibraheem (Alayhis Salaam) been called imaam mul muwahideen?

4. When ibraheem (Alayhis Salaam) made the kabah was the Hateem in the kabah and then the quraish changed it is that correct?

Nazar

Q: We often hear about nazr and the effects on babies etc. Can mufti saheb please explain the concept of the child's own parents nazr having an ill effect on the child? How does one prevent this?

Using contraceptives

Q: A couple have a new baby, the husband is in Madrasah and is not working. Parents are seeing to the costs of the baby. With this in mind, and the fact that more children may distract the husband studies, and with spacing of children in mind, are contraceptives permissible? What types of contraceptives are permissible, is the use of a condom haram?