Hi, some possibilities. If leaves are turning black are the stems/trunk also? If they are, then its over-watering and rot might be setting in....
Hi, to me it does look like a climbing aloe (Aloiampelos ciliaris). Young aloes, especially grown indoors, are usually more spotted. Mature ones,...
Hi , if you touch the stems are they squishy soft? If so then you might be over watering or the pot is water logged. I had this happen to an aloe...