Sure, there is a possibility - although every possibility is seriously stretching it.
By age 45, 18% of women have not given birth. A tiny proportion will still have a child after 45, but the proportion of those who will be birthing their first child will be very small so it's close enough to run with.
Estimates vary but the highest estimate I've seen for CAIS is 1 in 20:000 males
For ease of calculation I'm going to assume equal numbers of males and females which isn't accurate but at this level it's trivial.
So for a person of roughly Maggie's age there's approximately:
a 9% chance of being a female without a child
a 0.0025% chance of being a male with CAIS
So statistically it's about 3,600 times more likely that Maggie is a female bam with no sprogs than a male bam with CAIS