The parliament is in a state of chaos anyway with so many MPs being forced to leave due to holding dual citizenship - which is worrying because if they don't cover every basis once SSM does become legislation it could be challenged in terms of legitimacy. They'll probably approach Hanson's party yes.
Hanson was on TV the other week and flatly refused to vote on any legislation until the citizenship stuff was sorted - she was then challenged by Sarah Hanson-Young (Greens) regarding the SSM vote but Pauline Hanson never made clear what she'd do when it came to the actual debate/vote in the house (and instead said she was fed up of being personally victimised by Sarah and got emotional on live TV).
The Turnbull government is screwed come election time unless they can pull off some huge things before then. There's probably many Liberals that aren't happy at the moment with the whole referendum outcome and the fact Turnbull is for it. The current govt is in quite a difficult place at the moment imo, even though they argue they aren't.