Sunscreen is important.

I take a sip of my crisp, cold cola, enjoying the protection the umbrella above me provides from the overbearing summer sun. I push my feet into the cold layer of the sand and stretch slightly. How am I supposed to go back to uni like this? I slide my shades down my nose and peer over at Sai and Ari, Sai is hunched over the esky, trying to find the beers he brought. Ari is stripping down to her bikini. I glance behind her and smirk, at the same time, Ari wiggles her legs and shapely ass out of the tight denim shorts, she bends at the hip, giving the guy sitting with his mother behind us a good view. I watch him glance at his mother before looking back at Ari as she slips her loose linen shirt off. She glances over and meets my gaze; she quickly grins and winks at me before bending over again, knowingly or not, giving the guy behind her another good view. She stands up with a bottle of sunscreen. Sai looks up, and I see his eyes light up with expectation, but it doesn’t last long at all.

“Oi. Erik. Lather me up?”

I raise my eyebrows and risk a sideways glance at Sai. His cheeks are red and he looks towards Ari.
“Don’t be jealous, baby boy. You get to touch me all the time. Best friends should share, no?”
Her tone is laced with dominance and Sai grins and moves his legs, his hand trying to subtly adjust himself under his boardshorts.
“C’mon then Erik.” She addresses me again.

I kneel just above her head as she lies back on the towel. I get some sunscreen on my hands and rub my hands together. Ari subtly moves her wide hips back and forth, her tight, lithe body flexing with each teasing movement. I rub my palms at her shoulders first, before making my way down. Out of the corner of my eye, I can see him watching, holding his breath, his hand gripped around a bottle of beer. She arches her back slightly, her head moving closer to my cock, and my fingers trace the edge of her bikini top, spreading the sunscreen over her chest. My fingers glide across the slightest traces of abs on her tummy.

“Back now.” She breathes out.

She turns and lies flat on her tummy; her ass jiggles with the movement. I move to her side, kneeling close to her face again. I start with her back, massaging the sunscreen into her petite back. She glances up at me, biting her lip. I can feel Sai’s eyes burning into my back. I can only hope he won’t hate me after this… But based on what Ari has said. I think I’ll be fine. I lather sunscreen onto her lower back, my fingers brushing the curve of her ass.

“Don’t be shy, Erik.” She whispers. Angling her hand between my legs and grabbing at my hardening rod. Moving her fingers along the shaft.

I let out a small exhale before leaning over and greedily cupping her ass with my hands. I squirt some sunscreen onto the pale skin of her ass before massaging it in a lot harder than necessary. She moans beneath me, her fingers snaking around me, almost pulling me toward her face by my cock. I reach between her thighs and keep manipulating her skin with my fingers. Eventually, she lets go, and I know to pull away; her face is flushed, and she gulps as she looks at my crotch before standing up with a stretch.

“Are we… Good?”

The sound of my voice barely carries over the soft sounds of the waves around us. Sai and I not quite facing each other, angled slightly off as we both look towards where Ari is.
“Yeah man… We’re good.”
I glance over at him, doubtful. I don't want to hurt my friend.
“Trust me. We are. Good.” He says without looking my way.
Okay then.

“Vi will join us soon, right?” He asks. Trying to move away from this awkward subject.
“Yep. She’s finishing up her last exam and then coming here. She’s wearing her bikini below her clothes.”
Sai chuckles.