I need your help and advice. My spouse applied as the primary applicant for SN Subclass 190 in Western Australia last February 2013. I am his secondary applicant and my son (from previous marriage) is the dependent. We got married last year, June 2013 immediately so we can travel together in Perth as a new family. We received our Visa Grant in September 2013 and planned to make our first entry by August 2014. Unfortunately 4 months after the wedding, my spouse had shown some signs of instability which has caused severe marital damage in our relationship and my miscarriage. We tried to fix the marriage but he still have recurring unstable decisions in mind which always leaves me and my son like walking on a tight rope. So my big dilemma, time is running out and he kept us hanging-- There was a time he wanted to withdraw my visa, and then he wanted me and my son back, and then last month he decided that we'll travel separately and now he changed his unstable decision again and thought of cancelling my visa and my son's. I already expressed my resignation in my current post and my son's schooling has been affected. I don't want to get embarrassed should I still travel with the thought that my spouse really cancelled our visa and we'll get a hold departure order or send us back when we land in Australia. I just want to ask if you can help me of these following queries:
1. Can the Primary Applicant withdraw or cancel our visa immediately?
2. How will he request to cancel it?
3. Does it needs my signature or agreement? How would I know if it was cancelled?
4. If the Embassy responded to his request, how long will it be processed?
5. Can my son and I still dispute and how?
6. I already bought a ticket for me and my son. Should we land in Australian soil, can he still revoke or withdraw our Visa?
I hope you can help me in this delicate state. I'd greatly appreciate all your help and info. Thanks