Canada Family Law Question - single dad needs advise

Final divorce order (by consent) states that she has to pay 65% of family debt (total is $242,000 her student loan and $88,000 is my student loan) and I pay 35%. This amounts to me having to pay $28,000 to a student loan in her name. She's trying to vary the order, wanting me to pay the whole amount direct to her within one year (this is impossible for me) because she's remarrying (poor guy) and wants all things settled and because she wants to buy a house (he makes $100,000). I have proposed paying $2800/yr over the course of the 10 yr amortization period. She's claiming that i can get a loan against the equity of my house (my gf and I bought last July for $340,000, my gf paid the down payment). Of course, i don't have that kinda equity yet. What should I do here. Trial was adjourned to August. Help!