If it interfering with your SL, it's a problem. If he's using it instead of ML to you, when you are willing and available, it's a problem. If he's addicted to it, it's a problem. If you as his wife indicate that it bothers you, and you want him to stop looking at it, then it's a problem if he won't.
If he uses it to fill the gaps between himself as a higher-drive H and a lower-drive W, and the times you do spend together are mutually satisfying, then I don't see a big problem with it.