Markirsten/luckirsten witch one

What are you doing!!!!???

Alright guys this is the chapter when shit starts happening so brace yourselves. Peace peace pandas.
Oh btw make sure to watch the video above. I don't know why I put it there but I wanted to make you guys laugh. So if you want to laugh today or night watch that video.
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Kirsten's pov:
Lucas runs into the water and puts me down soon after Marcus runs in with twig behind him. I run and get twig.i hold him as I get back in the water. He starts kicking and I let him try to swim. As I'm in the water I notice that I have to go to the bathroom. "Guys I'm going to the bathroom". I say getting out of the water. " I'll go with I have to go to" he says also getting out of the water. "Ok," I say putting twig down. "Marcus can you watch twig while I'm gone" I ask. "Yeah sure anything for you." He says winking at me. I smile and my face turns red.
When I was done using the bath room I saw Lucas standing by the door. I turn toward him "ok are you re-" Lucas kisses me deeply on the lips. I had my eyes open the whole time. "What was that for!?!?" I ask him stepping back. "What? I thought you wouldn't mind." He says stepping closer."what do you mean 'I thought you wouldn't mind' you just kissed me out of nowhere" I say back. "You sure didn't mind when you did it to Marcus" he said looking down at the ground. "You saw that? Lucas I'm so sorry" I walk up to him and hugged him.
Marcus's pov:
As I wait for Lucas and Kirsten to get back from the bathroom I try to get rid of this boner. I look around to see if anyone is watching and I jerk myself off. Just as I'm about to reach my climax twig starts barking. I turn around and see Lucas and Kirsten walking back towards the water. "Damn it" I say not realizing that I said it out loud. "What?" Kirsten said " is there something wrong?" She says swimming towards me. "Umm....no...ahhhh." I start to scrunch up as I try to hold back from coming. I accidentally let out a small moan as Kirsten gets closer to me. "Are you ok?" Kirsten says giving me a hug. Her breast press up against my chest. I couldn't help it so I let out another small moan. Her lady parts hit up against my throbbing hard cock and I let out a really big moan. I let go of her and go under water. I was about to cum. I didn't want her to here me so I went under water. I jerk myself on more time and come. I gargle up water as I come, I see little white blobs of cum float around. The float to the surface as I come back up out of the water.
Kirsten's pov:
As Marcus comes to the surface of the water I see little blobs of white stuff float up with him. I reach and pick some up in the palm of my hand. "What is this." I ask him. He looks over at me. "Don't touch that!!!!!!" He yells as he swats it out of my hand. I notice his swimming trunks were pulled down in the front and some of that white stuff is there too. I look at the little blobs one last time and realize that it's his cum. "Marcus!!" I yell he turns to me. "WAS THAT YOUR CUM?!?!?!?!" I yell loudly. People start to turn towards us. Marcus's face turns red in embarrassment as I get out of the water. I grab twig because I didn't want it to get on him too. Or even worse swallow some of it. I spent the rest of our time at the beach on the sand with twig.