I'm sorry for saying this, but a somewhat large group suspects this as well. And i am not going to accuse you hard. I'm just throwing this out there.
I really like the art you have been posting, but it does seem a little suspicious. The style seems deadly familiar. The lineart does as well.
If you wouldn't mind, could you show a sketch before finishing something at one point?
I have a very big pet peeve about art theft and it makes me sick and sad to see it. I would just ask this of you, please. I am sorry.