Hey lionheart and mylastrolo:
I am a mum who is serving. My husband was in the forces, but left last year. You are 'allowed' to be a single mum in the forces, but it can be very hard because you are still expected to do all duties / exercises / deployments as the 'singlies' (and so you should).
I'm lucky that I've got dh around otherwise I would find it all too hard.....