Toddler keeps saying "mommy, mommy, mommy" if she cant see me? age 2?

My daughter's 20 months. The first time my child calls me, I answer right away. I might even answer the second time depending on the situation, but anything after that annoys me, so I just let my daughter know. I say, "Enough. I don't like that." or I just say, "Stop that. Go play." Or I'll give a suggestion for something she or we can do instead. She's a good listener, she usually cuts it out and finds something else to do.

My son did that around 2 1/2, but he would repeat mommy until I said what, even if he could see me and I was looking straight at him. Sometimes even then he would just wait a few seconds and then say mommy again. It drove me crazy because he never actually wanted anything. He did grow out of it, but it took a long time.

My little cousin is 2 and and she does the same exact thing. She will say "mommy" about 10 times than she would stop, wait awhile and say it 10 more times. She is still a baby, give it time. She will grow out of it.