Bearing in mind that throwing white flowers doesn't mean that it'll look anything like the parent, even if it's a similar color. Size, shape, layers all can vary, etc.

This is also nice information from the same link:

'Q22. Why does not the adenium grow seedpods easily?
Because the adenium cannot pollinate by itself, it does not grow seedpods easily.
It needs other flowers that can be on the same plant to help complete pollination.
Other than the help of insects, it really requires artificial pollinating.
To be able to perform the task of artificial pollinating,
one must fully understand the structures of the adenium in advance.
Pic-1 The adenium does not really presents its pistils and stamen, but they are hidden inside the throat.
1. Use a pair of scissors to cut off 2/3 of the flower’s throat.
While you are cutting, be careful do not cut off the five filaments because the stamen is inside of the filaments.
These five filaments will be in shapes of upside down funnels, and the pollen is inside the top of the filaments.
The color of the pollen is yellowish.
2. To retrieve the pollen, one can simply pull off the tip of two filaments.
As you pull off the two filaments to retrieve pollen, you will notice pollen is not much,
so you need to be very careful for manipulate. If you are not careful enough,
it is very likely that you will lose the pollen.
3. Gradually removing the rest of the filaments and pistils that are wrapped by the filaments will be revealed.
Place the pollens at the sticky area on top of the pistils.
4. When you have finished the above steps, your have successfully cross-pollinated the flower.
5. A good sign of proving that you have successfully conducted pollination,
the flower will drop after a couple of days. Then waiting for one or two more days,
the calyx should turn slightly red and will be getting bigger and bigger.
6. The best time to cross-pollinate is after adenium blooming for 2~3 days and it can be operated anytime.'

Anyway, happy reading!