C.D.
This is typical for any kid to go through but the one thing you don't want to do is replace the attachment with something you won't be able to break easily in the future. My almost 18 month old does the same thing she gets in her moods where she won't let me leave her side and klings to my legs. I have 4 children her bieng the youngest, and none of mine had blankies or pacifiers or nothing. I can't imagine how hard it is to break them from a habit like that but remember you arent a habit lol. Sometimes as stay at home moms end up with attached kids cause we are with them all day every day, hazards of the job I guess. My best guess having 2 under 5 myself is she just needs one on one mommy time like every day my son gets out of school at noon and me and him while the baby is sleeping have our time. We watch cartoons read a book or just play cars. In the mornings it is me and her while the others are in school. If you are a sahm and your 5 year old is in school try getting a sitter a couple hours a week so she gets used to you bieng away from you. You don't want this to get worse with a baby coming read her books about babies show her them in public sounds silly but she will know when you bring home the noisy wiggly thing that he is a baby and we be gentle. Let us know 13 months is a rough time to go through this I wish you luck.