If you have a bill of sale in your name, these items are legally yours and can be removed by you anytime that you want. You and you alone have rights to these items.
Make sure that you hold on to this bill of sale in case your sister has any questions or future problems.
But in answer to your question, since the bill of sale is in your name, these are your items and you can dispose of them as you see fit.
I hope this helps! If this has helped, please accept so that I may continue to help others as well.
Thank you for accepting. In answer to your uncertainty about any legal validity on your sister's part the answer is definitely no if you do in fact have the bill of sale. These are legally your items and would be viewed by the court as being on loan to your mother. You are the only one who has any claim whatsoever in this circumstance. If she does try to make an arguement just make sure to produce the bill of sale and this should clear the matter up quickly. I am glad to be of help to you, feel free to visit us again should you need assistance in the future.
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