No, bathing without your mother is not a sin in Jain Dharma.

In Jainism, sin is mainly connected with intentional harm, wrong conduct, attachment, anger, deceit, greed, and violation of vows. Bathing alone, or needing your mother’s help, is not a moral fault.

If you are young, ill, afraid, or need support, it is completely fine to take help from your mother. That is not considered sin.

What matters in Jainism is:

• intention
• purity of conduct
• non-violence
• self-control

So please do not worry — this is not a sin.