Liquidate your current portfolio to get out of a loan more quickly?

I'm interested in how you would handle the following situation: When I moved into my new apartment two years ago, I was borrowed €7,500 from my aunt, among other things for the deposit, furnishings and start-up assistance after my studies. I repay the debt in monthly installments of €180 interest-free. There are currently around €3,500 still outstanding. I will promptly receive a bonus that, together with the current value of my portfolio (approx. €1,500, FTSE All-World), could resolve the loan. On