Looking for a story about family friends accidentally fucking on their trip on a boat

[Leahz96]

I dont remember the title and the names of the characters but the story goes like this...

Their moms are best friends and are on this boat trip with their families. She gets stuck and he tries to help her they both end up being horny then fucking and then fucking more when their families temporarily leaves the boat for a few days. The end of the story is their moms telling her that he is transferring to her college.