Parents forcing the son to divorce his wife

Q: Prophet Ibrahim (Alayhi Salaam) told Ishmaal (Alayhi Salaam) to divorce his wife. Ishmael (Alayhi Salaam) did. My parents demand the same. My wife prays and wears hijab and is from a different country from me. My parents want me to marry women who are more cultural and don't wear hijab, since none of their 4 daughters/my sisters wear hijab. To what level of authority do parents have?

The first husband returning after the wife remarries

Q: Please inform me the law in the hanafi mazhab if news regarding the demise of one's husband was received and after iddah, the widow got married to another man but after some years the first husband comes back. Which nikaah will be valid? With the first husband or the second husband? The woman has one child from the first husband and two children from the second husband?

Women's Salaah

Q:

1. How women must lift her hands during the first takbeer – close to the middle section of her bosom or close to the area near armpits where bosom part starts? Takbeer must be said after hands are up, not during lifting them up, is it correct?

2. When we say takbeer in salaah (women salah) we immediately go to next posture and we finish saying takbeer only after reaching it. How to deal with mistakes that happen sometimes with this, when we are too fast either to say takbeer or to reach the posture or we are just the opposite, to slow? Do we have to repeat salaah or make sajda-sawh or ignore this? I have some salahs where I made such mistakes, what to do about those salahs, repeat them or not?