[the Deejay]

I thought another son wants to enlist in the military.

Maybe, Casey joined up to get away from mom,?

Maybe that's why another son plans to join the service?

And Mr. Sheehan left Mrs. for more reasons than one?

(This was the proverbial straw that broke the camel's back w/Mr. Sheehan?)

[Just A Nobody]

Yep...that's what appears to be the case - on all counts!