My daughter had a pacifer and we weaned her from it around 18 months. It went super well and no tears at all. Now, she has a 6 month old baby brother who of course loves sucking on his fingers and thumb. So she recently has began sucking her thumb to mimic his behaviour (I’m assuming). At first, I was ignoring the behaviour but now it’s gotten worse. She seriously sucked her thumb all day! I gently tell her to remove it from her mouth and even offer her a teether instead… but now she’s sucked her thumb while I laid beside her to put her to sleep. It’s become very comforting for her. I don’t know what to do. It’s a terrible habit 