I don't have any experience with this plant, but hope this helps.
Link with some info for background.
http://www.plantzafrica.com/pl...
The link says it can be grown from fresh seeds or propagated from hardwood cuttings taken in June or July. This is what I would suggest. Get a 2 gallon black nursery pot and fill it with sharp sand. Take 12 - 8" cuttings from your Aunt's bush (wrap them in damp paper towels until you can get them home). Wet the sand until water stands on top. Allow the water to drain and add more sand and level it off with a stick. Remove all the leaves except the top 2 and cut 1/3 off the top 2. Wet the bottom end of the cuttings, shake off excess water, dip in rooting hormone and insert into the wet sand leaving 2" exposed. When all the cuttings are in the sand, cover the pot with a white opaque plastic grocery bag and fasten in place with string or wire. Set the pot in dappled shade (never in direct sunlight) and leave it alone for 2 months. After 2 months your should be able to see new growth on the cuttings through the bag. Use sissors to snip several vent holes just above the top of the pot. After another week snip more vents at the top of the bag. Finally after one more week, remove the bag lay the pot on its side and using a water hose gently wash the sand from the roots of your new plants. Muddy the roots as you separate them and pot them up so they can harden to their new environment. Claud
