I like to take long baths, soaking and reading. I like to have that time alone to relax.
...Unfortunately, my son doesn't think I should be alone. He likes to come in and keep me company so I don't get lonely. (His words.) He offers me toys, and talks to me, and does various things that you would expect from a four-year-old who doesn't really want to sit around in silence while I read.
I came up with a solution. It allows me to enjoy my book, while not rejecting my son's attempt to spend time with me.
I read out loud.
Eventually, he gets bored of the book with no pictures, and wanders out. I don't lose book time attending to him. I don't get frustrated and upset with him. He doesn't walk out crying or angry. And, most importantly, I don't have to lock the door to the only bathroom in the house to get some relaxing done.