I'd agree with HaiHallarn's second post if she were in pretty much any job other than the services.
She is in the wrong job.
The comment from a senior army officer that the army is "a war-fighting machine unsuitable for a single mother who couldn't sort out her childcare arrangements" is absolutely spot on.
I'm struggling to understand the racial discrimination angle she tied to play. How is refusing a half-sister entry into the UK to look after her child racial discrimination?