While at home with my husband, yes. While at home only with my son, not anywhere near as much. While on vacation at my parent's, hardly at all.
For me it's more boredom and not having anyone with whom I can have an actual conversation. Yes, my husband will listen to just about anything I say, but he never has anything interesting to say. He doesn't read books, doesn't read the newspaper, has no special interests, nothing. He lives each day just existing, not learning anything new, so after a while I just get bored and spend hours on the internet reading, learning new thing, blogging or working on my online business.
When I am alone with my son, we are normally homeschooling and we have a great time together, so I hardly ever really go into the internet except to check Facebook or similar a few minutes.