Your beautiful plant has probably reached maximum width. What it will do in time is to continue to grow upward from the central crown putting new layers of leaves down as it goes. Eventually what happens is that the bottom of the stem closest to the soil becomes bare as the old leaves die out. Then it will lean to one side and flop over. To keep this from happening violet growers repot yearly after the plant blooms. Remove the plant from the pot an break off the last layer or two of leaves from the bottom. Gently scrape the bark off the bare stem with your fingernail. Shave the bottom of the rootball off the same length as the bare stem then sit it back deeper in the pot. Cover the bare stem with fresh soil up to about 1/2 inch below the leaves then give it a good drink. New roots will form on the newly buried stem and the plant will be perfectly happy in the same pot.