Good clarification. Little boys get attached to their moms all the time (I witness it in my own son). But they have to learn to detach, and they're surprisingly good at doing this as they get older (kids are good at adapting!). He's gotta go to pre-school, K-12, after-school activities, etc. So the little guy will get by, really. It's hard at first, but they learn quick. Now, even if the OP went the civ route, she'd still be separated from her family for periods of time (2-3 days, during intern year and res), no? So again, both mother and son have to learn to detach a little bit. I know 5 weeks sounds like a lot of time, but it's really not. Perhaps they can use the opportunity to allow son to get more attached to papa or a grandparent.
Oh and . . . what F-ing recruiter told her she didn't have to do officer training or any other ADT during med school ? And would this have been a deal-breaker for her???
Again, the officer school and ADT during med school is just the tip of the iceburg. She should be prepping to deploy sometime, that's the more serious deal. . . . And if she really doesn't want to do this any more (for whatever reason, medical or otherwise), I think she can still bail and pay back her MSI year.
good luck . . .