Nikaah & Marriage Issues

Hurmat-e-musaaharah becoming established through touching a woman with lust

Q: I had read that hurmat-e-musaharah take place only if there was a lawful relationship. I just saw a post that if a man committed zina with a women he cannot marry his daugther. But if he wasn't married to that women and was mislead by shaitan.

Below is what I found.

On the other hand Imam Shaafi (rahmatullahi alaihi) is of the view that hurmat-e-musaharah is established only through lawful intercourse and not through unlawful sexual intercourse or touching.

Woman thinking of her father in-law

Q: If a woman thinks her husbands private part is her father in laws private parts or thinks they maybe similar to her father in laws private parts, and imagines her husband's private part and maybe also imagines the father in laws. Whilst having these thoughts (she hasnt actually seen them nor does she wish too) does thinking and imagining this affect the nikaah of the woman and her husband. She obviously knows her husband's private parts are his but she just got the thoughts explained above.

Bringing children from one's first wife to spend the night with one in one's second wife's house

Q: I have made up my mind to take a second wife. I have four young children from the first marriage. I am concerned about not being able to spend enough time with the kids to participate in their tarbeeyah as I am a busy doctor and usually come home after Maghrib. Can I keep some or all of my kids with me when I am spending the evening and night with my second wife?