Ok, then good. But, she should stay on that recruiter about the phone call. They dropped the ball on that for some reason. They shouldn't have offered him the choice, but perhaps he decided not to call. The hardest marketing job the Marine Corps has is with the mothers of potential recruits--we shouldn't be screwing that up.
Stoney is right, she should work through the recruiter and see where that gets her. It will either range from nothing at all, a few apologies first will definitely be from the recruiter, to maybe even a quick call from your brother in law. Granted my circumstance was pretty unique and I didn't know many people at all that had any problems with any promises made to them. There was another situation that came up later on that chapped me a little bit but I shrugged it off as no big deal, it only meant about $20K more for college later on

I meant for the moral of my story to be that it was a blessing in disguise. I loved my time in Okinawa and every other country that I went to. Stoney went on the same MEU IIRC and he can tell you that it is a blast, I was able to see a lot of places with the most memorable being Iwo Jima. I'd also be willing to bet that your brother in law was afforded the opportunity to call and did one of a couple of things with it, either tried to call and didn't get anyone, called his girlfriend and told her he was there and she took it for granted he called his mom, or just didn't call. I don't know him so I can't predict what he did but I just can't see the receiving D.I.'s not giving a whole platoon, well really normally most of a company is brought in over the course of one day, the opportunity to make their quick little phone call. You don't get long, mine was literally like this.
"Hey mom, I'm here and I'm ok."
"Ok son, take care of yourself and we love you."
"I love you too, I'll see you when I get done."
"Ok, we'll be there, we love you."
"Love you too."
Click
About 10 seconds worth after it was picked up and you're moving out of there so there's a good chance if for some reason he didn't get an answer that he might get another opportunity to call later down the road.