Crediting mother's money into her bank account

My 80 yr old Mother immigrated to the US in '23 to live with me. Since she doesn't have any source of income in US we did not open any bank accounts for her. She had a property transaction in her home country in 23 proceeds from which about $70,000 USD we decided to keep it in my account in the US for costs and expenses current and future.

 

Now in 2024 we have become aware that she has some tax lilability in 2023 and have decided to proceed to open bank accounts for her.

 

We would ideally like to put the $70K back into her account and use some of it towards her tax liability and invest the rest.

 

We are not sure if this can be explained as her money kept in my account and avoid Gift filing implications. It was never a gift just that she didn't have a financial account and now that she does and also to pay her tax liability we want to keep it in her account.

 

We can instead treat it as a gift and file forms needed when gift exceeds annual exclusion OR we can treat is as a interest free loan have her pay tax on the interest (approx 5% $3600) and gift me the interest. But these were not the intent, she had just parked money in my account given she had none and now that we have needed to open accounts for her we would like to keep it in her account, can we? without gift/loan implications? How can we explain in case IRS has questions?