Should I tell the mom I’m babysitting?

I’m babysitting for someone’s daughter and their mom is out of state and I brought her daughter to see her boyfriend tonight and when we got back to the house I saw that she had a vape and I asked her where she got it from and she said the boyfriend and ended up giving me the vape, so I want to know if I should do the moral thing and tell her mom still or just keep it a secret for her sake? She did tell me the truth but still. (She’s 14 and in 10th grade)
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Ignore this question i think im just worried of the daughter not liking me anymore lol… i was going to regardless
Should I tell the mom I’m babysitting?
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