Holly's Intuition is the second book in the Erogenous Zones Series by Saskia Walker. I reviewed the first, Monica's Secret, here.
This book can be read as a standalone, in my opinion, but you'll have more idea of what certain references mean if you've read the first one, so I'd recommend it.
This story tells the tale of Holly. One day, her neighbour Joshua has an accident, and she rushes to his aid. It's not a fatal accident, and since it happened, Holly has had some kind of psychic connection with him. Confused and overwhelmed, Holly says nothing to him, but confides in her sisters, both of whom also have psychic abilities.
The worst thing about Holly's connection with Josh is that it only seems to be activated when he's had a rush of emotion; happiness, stress... or arousal. The result is her being able to see everything Josh is getting up to sexually, including having sex with the guy Holly thought was his flatmate. She quickly realises that they're a lot more than just flatmates.
Both guys are incredibly attractive, and Holly can't help but get aroused by the visions that fill her head, to the extent that she's soon wishing she was sandwiched between them, being pleasured by both. It drives her crazy with both lust and confusion about why this has happened to her, and she has no idea what to do about it.
On the other side of the wall, Josh and his boyfriend Stewart have no idea that Holly is inadvertently watching their sex life. They have other things on their mind. Since recovering from the accident, Joshua is now feeling increasing pressure to "out" himself to his family. A few short months ago Joshua had a girlfriend and no idea he liked men. All that changed when Stewart came along, and, despite knowing his feelings for Stewart, Josh is still incredibly conflicted and confused about his sexuality.