My girlfriend said I need space then posted vacation photos with her ex!????

My girlfriend said I need space then posted vacation photos with her ex.
Three weeks ago Emily drops this nuke text while I'm making dinner. We'd been together almost two years, living in my apartment for the last eight months.
"I need space to figure things out. Don't contact me for a while."
Okay, that stings. But I'm trying to be the understanding boyfriend here. I text back "Take all the time you need" and respect her wishes completely. Radio silence for five whole days.
Then Friday night I'm bored, scrolling Instagram. That's when I see it. A mutual friend tagged Emily in vacation photos. Beach sunsets, tropical cocktails, her looking ridiculously happy.
With Jordan. Her ex-boyfriend. The one she swore was "ancient history" when we started dating.

My blood runs cold. Space to think meant a romantic tropical getaway with her ex while explicitly telling me not to contact her

Saturday morning, first thing. I call a locksmith. "Need new locks installed today." New deadbolt, new doorknob. $250 total. Worth every penny for the peace of mind.
Now the car situation. 6 months ago i Bought her a used Mazda for $18,000. loan, title, and insurance are all solely in my name. The understanding was she'd make monthly payments to me, which she did. Mostly.
She treated it like hers, decorated it with fuzzy dice and air fresheners. But legally its 100% mine.
I take the spare key I always kept, drive it straight to CarMax. "Need to sell this today." They inspect it, offer $16,500 pending paperwork. I sign the initial documents. They'll handle the rest.

Tuesday night, 9:17 PM. I'm watching Netflix when I hear it. Keys jangling outside my door. Scraping metal on metal. Silence. More frantic scraping.
Then pounding at the door.
"Ryan! What is going on? Open the door!"
Emily's voice. Annoyed, not panicked yet. I take a deep breath, open the door just a crack.
She's standing there with her suitcase, looking tanned and confused.
"My key isn't working. Did something happen to the lock?"
"No, I changed them." My voice is calm.
Blink. "You... what? Why would you do that?"
"You asked for space and no contact, Emily. I gave it to you. Permanently."
"What are you talking about? I just needed some time to think. You can't just lock me out!"
"I saw the vacation photos with Jordan. Looks like you figured things out pretty clearly."
Her face shifts from annoyed to furious.
"That was just a friendship trip! It didn't mean anything. We're just friends now."
I raise an eyebrow. "Friends who go on romantic island getaways while asking their current boyfriend for space and no contact. Got it."
"Ryan, don't be ridiculous. Let me in. Where's my car?"
Her eyes dart to the empty parking spot behind her.
"Where is my car, Ryan?"

"First, it's my apartment. Second, it was never your car. Legally it's my car, and I sold it. It's at CarMax right now."
Her jaw literally drops. "You're selling it? You can't do that! I paid for that car!"
"You made payments to me toward using it, Emily. You didn't buy it. The title and loan are in my name. Sale's already processing."
"This is insane! You're stealing from me! I'm calling the cops!"
She actually pulls out her phone.
I just shrug. "Go ahead. Call them. Explain that your ex-boyfriend changed locks on his own apartment after you asked for no contact and went on vacation with another ex. Explain that he's selling his own car. Let me know how that goes."
She hesitates, phone halfway to her ear.
Then her expression turns venomous. "You horrible person! You planned this!"
"You planned a vacation with your ex and asked me for silence. I respected your wishes and dealt with the consequences. You don't get to keep me on standby in my own home."
Suddenly, another voice. "Emily? What's going on?"
Her sister Brooke appears, marching up the walkway. Must have been waiting in the car.
Emily immediately turns on the waterworks. "He changed the locks, Brooke! He's selling my car! He's throwing me out!"
Brooke turns on me. "Are you serious, Ryan? After everything she's done for you, you just kick her out and sell her stuff?"
"It's my apartment, Brooke. And it was my car. She asked for no contact and went on vacation with Jordan. We're done."
I close the door and lock the deadbolt.