Inherited share of property, can this be “loaned” to sibling in England ?

Our mother has just passed and I am to receive 1/3 and my sibling 2/3 of her assets which include a small amount of cash and a house with a mortgage on it. Cleaning and Selling the house would be too much now, so we want to keep it. I live permanently abroad. Sibling lives in the house. In order that they don’t have to borrow as much from the bank to pay the mortgage, it’s been suggested that I loan “them” my share. And possibly in a couple of years then sell the house and return to me the value made of my 1/3 share of the house. Is this legal? Is this risky? Are there any other alternatives? We do not have the necessary funds now to pay off the house fully. Thank you. P.s. this is the first time dealing with inheritance and as I have lived abroad for so long, I am unfamiliar with the legalities but am learning them now.