Yep all legal.
My advice is contradictory to some of the stuff above. Food for thought.
Stop paying for stuff. Clear out bank accounts so she cant access them. If you're paying for her phone then don't. Contact the bank and explain, you'd be surprised. They have hardship provisions. Save every cent you can. WHY? well it seems to me she is gonna make this as difficult as possible. She isn't being fair. True? Reasonable? NOPE.
So this is gonna get expensive. Start saving ????
And - the mortgage is a big one. Story time... I was in a similar / worse situation. I was kicked out of the house. She had an avo against me. So I could not go near her / the kids / the house. I'm paying mortgage, rent to put a roof over my head, child support, car loan for a car she was driving, health insurance, her phone, electricity, gas, child care costs and legal bills to try to get access to the kids. Meanwhile she was getting single parent payment, family tax benefit, child support and she didn't have to pay for accomodation or any of the bills - Basically she had about $2000 a fortnight to buy food, clothes and fuel.... Meanwhile I was spending more than I was earning whilst living in a s**t hole rental place with barely enough $$$ for food. Oh and I"m working 40 hours a week, she wasn't working at all, but still had 3 days a week with the kids either in child care or school..... So why would she want that situation to change? Why would she wan't to agree to sell the house? Give me access to the kids? The answer was she didn't. She would have been happy for that situation to go on for years and years.
She refused to respond to letters from solicitors and when she eventually did she wrote back an extortion letter. Basically, she would agree to me having the kids one night a week IF I agreed to continue paying the mortgage and child support and spousal maintenance.... It was madness.
So I stopped paying. Stopped paying the mortgage, her car loan, health insurance, I got the electricity turned off because it was in my name, same with internet. All of a sudden she had a reason to want to talk, she had to compromise and she was angry about it... GOOD. So with the bank threatening to take the house she agreed to 5 nights a fortnight and to put the house on the market. See it is all about power. When I was paying for everything she had all the power, she had the kids and used them as bargianing chips. I had nothing. But when I stopped paying she was gonna lose. The power dynamic changed and she became more inclined to be reasonable...
rant over.
cheers