Look, its not too fabulous but I'd be inclined to seek further help just with helping him integrate into your "new" family. Things have been up and down for the little tyke and it may take awhile. He is also at an interesting age! Some kids are more resilient than others too.
Things have been a little up and down at my place too and DS is having a little trouble too. He is a pretty sensitive kid but at the same time able to push boundaries like you wouldn't believe, so I'm getting a little help from the experts. Mainly to keep me focussed and feel supported!
Little boys like their doodles and think they're a bit fabulous, DS had the "doodle dance" as part of his nightly repetoire after his bath, but he grew out out it. I just remind him it's his "private area" just for him, and that only mum, dad and he is allowed to touch that space.
I'd tackle the behaviour first and if things seem strange AFTER then, focus on that. It's just another part of his body - he probably stuck his bum in her face first.....