Beach Masturbating and Getting Caught

I go camping a lot with my boyfriend and we love to get naked outdoors and have sex. One weekend we were in the idaho mountains at a beautiful little river camp spot. I had found a cute little secluded beach area on the river for us to get it on. I had the blanket layed out with some wine and all. I went back to camp and Jack was just waking up from nap in the tent so I wrote a little note and told him I would be around the bend of river waiting for him. I walked back down the river in the warm summer sun and sat down for a glass of wine and to wait for Jack. After about 5 minutes my sundress was off and in about 10 minutes I was on my back in the sun playing with my clit. I heard a little splashing coming down the shore and I thought Jack would love to see me masturbating like this so I just continued dipping my fingers. 15 seconds or so went by and I noticed it was silent. I sat up in the sun and there were two fly fishermen with giant disgusting smiles on their faces!!!!!!!!