maybe remove the comma
change "hers" to "her"
maybe change to "get your inheritance back"
maybe change to "when she may double cross you — someone learned that the hard way"
maybe place "and" before "that's"
lastly, im not sure about the latter half of this sentence. like, i get what they were going for, but i dont feel like its landing, though i cant think of a way to improve on it. sorry.
There’s a small P.S: “You are, of course, invited to the grand opening of my future, planet-wide pleasure resort: OvviLand!”
Truly despicable of hers. You made a pact with the devil and will now have to live with it. Let’s hope she won’t be a pain in your side before you get back your inheritance. You never know when she’s gonna double cross you — someone learned it the hard way today. At least you’re safe and sound, that’s all that matters. Some will call you a coward, others an opportunist, but none will be close to the truth. You are whole, complete... unlike Ovvi’s broken creations.