I haven't posted much to you but have followed some of your sitch and your posts to others. It seems your H and mine are very, very similar. Mine is also usually very "nice", often cheery, and generally secretive about his plans. He was especially secretive at the beginning of our S, even about ordinary things. Now he seems to go out of his way to NOT be secretive when his plans are harmless.
But I have no doubt my H is in MLC. Trust me, when I pushed him a couple of times, he spewed venom like I have only heard him reserve for sworn enemies. Plus, he has totally rationalized the effects of all of this on our S, and he absolutely adores S14. But he takes a very victim-like, poor-me stance about having to give up full time with S. As Angelica posted, it is a strange contradiction of being totally full of himself while at the same time having a very low sense of selfworth.
Sorry I've rambled a bit but I didn't want you to stay too long in doubt mode. Anyway, all DB recommendations to GAL, keep a PMA, and grow yourself are healthy, regardless of the your H's MLC status!