Yes, let him see more

Unfortunately you don't have many photos of Ariana like that on your phone, except one you snapped of her undressing during your last vacation together. You're a little hesitate about showing off your wife's breasts but it is your bestfriend and you trust him. Besides, his picture of Kali showed off even more, you rationalize.

You open up the photo of Ariana on your phone. Unlike Kali's photo, Ariana is wearing a thin pair of silk panties that hug her tight butt. It's the only thing she's wearing though, as she's currently in the process of discarding the matching bra. You snapped her mid-turn again, as she noticed you in the door. Her cute face and kissable lips are contorted into surprise, her mouth forming a small 'O'. You caught her just before she had time to cover herself, so there's ample side boob on display.

"Holy shit, man, I can see her nipple in that one."

Your face goes red.

"Yeah that's the best picture I have of her from behind. I think you're right though, your girlfriend's ass is rounder."

"Nah, Ariana's ass is perfect. Looks very firm and tight, though it's hard to tell without touching."

"I can confirm it is definitely toned and she looks after it." You tell him, as you picture your wife's morning yoga routine in your mind.

"If we're showing nudes, then I've got the perfect one for you."

A couple seconds later, he holds up his phone with a new photo of Kali. In this picture, she's totally naked again, but it's a frontal picture. She's sitting in an armchair, the one that in the corner of the living room in fact, with legs spread and dangling over the edge of the arm rests. If it weren't for her hands tantalizingly cupping her pussy, you'd be able to see everything. As it is though you're more than content to gaze at her round, perky tits, full enough to fill your hands but still perched highly upon her chest.

"Wow, that's really hot. You really lucked out with this one man." You tell your best friend.

"Don't I know it. I know I've been a bit flakey when it comes to women before but I really think I'm ready for something like what you and Ariana have now."

"That's great man. Ariana will be glad to hear it, she's always wanted you to add a fourth to our little group."

Despite the direction of the conversation, your phones are still out and the pictures free for anyone to look at. You get the sense you should show him another picture; he showed you three and you've only shown two, and although your last one was almost nude, his was practically full frontal. However, the only full frontal image you have is even more risque than the last.