Hi, thank you for your question. As you did not pay rent and it appears you had no formal agreement with your parents you would not be considered tenants and would only be considered lodgers of the property. Therefore, she would have been subject to no security of tenure and "evicted" upon reasonable notice and after which she would only need to be formally contacted a reasonable amount of times to collect her belongings after which it would be justified if you were to dispose of them.
You need to write to her to state:
-Exactly what items are left behind
-Where they are being stored
-For how long they will be available for collection before you dispose of them (which should be a reasonable time). As she is abroad it would be seen that a longer period of time than the usual 14 days would be required.
I would suggest that you email, text and send a letter by tracked delivery to her residence in India so that you have proof that she has been contacted about this.
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