You calm them down and reintroduce yourself

The girls were panting out their adrenaline and staring warily at your armed lovers by the time you approached them. You gave them your most calming smile and approached slowly.

"Welcome to my shelter, I am Alexander Novak," You told them.

The young women exchanged confused glances. Carmen, the brunette Latina was the one that spoke first.

"Have we meet?" She asked hesitantly. "You seem familiar."

You chuckled. "Yeah, but I am not surprised you don't remember me. It was a while ago, and I have shaved my beard since. Plus, last time I saw you all, we weren't even in the US."

There was a pause of two seconds at that but then their eyes almost simultaneously widen in recognition.

"You are that Tour guide from our College vacation to Panama a couple of years ago!" Said the blonde girl from...Alaska, if you recall correctly.

"That's right Ava," You confirmed with a nod. "Honestly, I wasn't expecting at all to see you ever again. Imagine my surprise when I saw you through the cameras of one of my drones. Still, it's good to see a familiar face, even though we only meet that one time. Ever since this Zombie pandemic broke out in full a week ago I have only had these former soldiers to keep me company," You explained, keeping the fact they are also your lovers quiet for now.

The group was quiet for a moment, pondering this strange bit of luck. Then, Luciana, the gorgeous dark-haired Brasilian of the group asked the obvious question. "What are you even doing here and with a stocked shelter at that?"

"A very good question," You acknowledged. "But the answer is very long and complicated so for now, suffice to say I learned in advance that this Zombie plague was coming due to a...let's say unofficial contact in the CIA, but, as the intelligence agency was covering it up to prevent a panic while they still believe they had a chance to contain it, I couldn't really tell the truth to anyone without risking a government-sanctioned "disappearance". And that was if anyone even believed me," I said with a long sigh. "So, I used the vast fortune I expanded when I gained a billion dollars through the lottery to prepare the very best underground shelter I could commission, among other things, before all hell broke loose. And, here we are."

"Huh, sounds like you have a very interesting story to tell," Said Kate, the lovely redhead of the group.

"You don't know the half of it," You assured them. "I will tell you all about that later, though. For now, is anyone injured?"

They shook their heads.

"Good," I nodded. "I seem to recall one of you was finishing her training to become a paramedic, though. Which one was it?"

Carmen raised her hand.

"Well, your profession just became a hell of a lot more important this past week," I noted. "Remind me to show you around my stockpile of medical supplies later on. If something goes wrong you need to know what medicines, surgical instruments and the like I managed to get before the outbreak spread to the masses. For now, though, let's have something to eat, as I am sure you are famished."

"Thank you," Luciana said in a small voice as it started to sink in that they found a safe haven.

"Yeah, thank you so...the heck!" Ava shouted in shock as she noticed that one of the military girls had started to undress.

"Ah, hehe, yeah I forgot to mention," You said quickly, trying to do some damage control as your guests got tense. "You see, while I got dressed to greet you the three of us previously decided that, while we are all in the bunker, it is normal to mostly stay in our underwear or get naked to save water on the washing machine."

The girls had blank expressions for a few seconds but then the tension and wariness visibly drained from their body language and they smiled at you sheepishly.

"You know, when you think about it, I guess that sounds perfectly logical," Ava acknowledged. "Sorry for freaking out for no reason."

"Don't worry," You replied. "Sophie here should have explained before removing her shirt. Speaking off, could you please go downstairs love, and make sure their rooms are ready and that the showers for our guests are working?" You asked the half-naked blonde.

"Sure thing boss," She answered, throwing you a knowing smirk as she left down the corridor, her naked back in full view the whole way.

At that moment, you noticed that Kate had eyed her retreating form with a lot more interest than her friends and filed that away for later.

"So, as I was saying, let's go eat," I told them.

And with that, the grateful girls followed me, not suspecting a thing.