i'm no expert and as stated, this is too important to not get professional guidance if you're unsure. my understanding (and you can verify this by googling for many articles including on the ATO website) - you made the non-concessional contribution in FY17 when the annual cap was still 180k and accounting for the bring forward rule you could at that time put in up to 540k in one hit (but can't contribute for the next 2 years thereafter).
so i think you are probably fine but can't put any further nonconc contributions in her name in FY18 or 19. then you can go again in Fy20 but now at 100k/year or 300 using the bring fwd as long as she's under the 1.6m cap. i'm not going to try and tackle the bit about the lump sum withdrawal - it sounds ok if you'll be in pension mode but you need to to talk to an accountant or super specialist.
