i think you must not spend more than 90 days a year out of the UK from either year of your spouse visa to be eligible for ilr i think. not looked it up as neither me or the missus can afford to spend that much time out of the country
I would seriously check exactly how many days she has already taken out out of the UK since your wifes visa started and get some confirmation otherwise it may cause you a few headaches come ILR application time.
