There are some nice blooming plants that are cat-safe. You can find good lists on Pinterest. The lipstick plant (Aeschynanthus radicans) has a draping effect. There are some variegated varieties with nice foliage. One of my favorites bloomers is the trailing African violet. It's got a different form than the violets you usually see in garden stores and is an enthusiastic bloomer.
Cats have very delicate neurological systems, which can be sensitive to toxins. Everyone had an image of a cat eating a lily and dying hours later. But kidneys can be affected in ways that don't show up for months. If a cat wants to clear out a hairball, he or she will return to a plant that made them vomit. So unless you have a place that's inaccessible to your cat, I think your lovely angel wings should find another home.