Watch carefully how they do around the plants and keep some tasty cat grass nearby to distract them from your houseplants if they feel like chewing greenery. I find with mine that they definitely prefer to chew on anything that has long, grass-like leaves, e.g. spider plants (which are safe). If you have any plants that are outright deadly for cats (e.g. any sort of lilies) remove them from the house completely - better safe than sorry! Also remember to check cut flowers for toxicity if you like to keep bouquets around! I've heard of people carefully screening their potted plants just to find their cats become sick after chewing on bouquets on the table.
And sorry if this question sounds ignorant, but coming from Germany I'm not too familiar with the English names of houseplants: Aren't devil's ivy and the money plant pathos (pothos?) one and the same plant (Epipremnum aureum)? I had some of it and they never chewed on it, but I removed it anyway because I had it in the same pot as a Dracaena palm, which they did chew on (long, grass-like leaves...) and it's not good for them either.
Right now, I have some spider plants (which they love to chew on, so they serve the function of "pretty cat grass" around here...), some cacti (which they never chew on - I wonder why?
), lots of coleus (they don't chew on it, but it would be safe if they did), a Norfolk Island Pine (also safe, but they don't like to chew on it), orchids and African violets (which are safe but luckily not to their taste either).