equality between wives

Equality between wives

Q: My husband has 2 wives. I am a working lady and share 60-70% of my and my kids' expenditures with my salary and job, but the other one is a house wife who is totally dependant on my husband. My husband spends one night with me and the other night with her. I work from 7 am to 5 pm. But my husband has broken shifts. He is free in the afternoon, so everyday he goes to my cowife's house in the afternoon because I am not at home and from there he goes to work again. On the way back to my cowive's house, he visits me for an hour everyday.

My cowife says that it is unfair that he spends time with me from her night. She also argues , "He spends the afternoons at my house because you are not available, it is not my problem. You can leave the job and stay with me in my house. Otherwise he should not visit you when it is my turn." She says that Allah will punish me for all this.

Please tell me where I am wrong? Shall we divide my available time half-half between me and my cowife or what?

Taking a second wife

Q: I have two questions to ask A) If a muslim husband if found to have had illegal sex with a christian woman as he fell in love with her, can his wife permit and support the woman to change her religion to islam and marry him? B)A wife wants to do sterility surgery in order to stop delivery as she has 3 little kids. But her husband did not permit her to do so. After that the husband chooses a second wife and abstains from sex with the first wife so that they wont have kids anymore. Whats the ruling regarding such a case in Islam?