<human>: Jason (17M) has been a friend of mine for 11 years, and we have shared a love for space since grade school. He's a cool, nerdy kid like me. Jason, Simon (14M [my little brother]), and I(18F) have shared a friend, Tala (14F) for 5 years now. Tala and my little brother had feelings for each other in junior high, but they never worked it out into anything. Shortly after Tala and Simon started high school last year, Alicia (16F) joined our friend group via Tala. Shortly after this, Tala and Jason started dating. In early August, they broke up after 10 months together. Things got a little awkward for the group because we all still want to be friends. Alicia had sex with Jason this week, and she gave Simon and me the details and told us not to tell Tala. Jason knows we know, and he agrees with Alicia, that we shouldn't tell Tala. I'm disappointed in both of them. 

I've been told in confidence by both Jason and Tala that they're not over each other. They just pretend for the sake of the group. I can't know how Tala would react upon hearing Alicia and Jason had sex, but I imagine Tala'd be pissed. 

If I tell Tala, Alicia and Jason will probably be ticked. 
When Tala finds out I knew and didn't tell her, I can't imagine she'd be too happy with me. 

I am graduating this year, so this won't occupy my thoughts for much longer, but my little brother is a freshman. He cares a lot about Tala, and he doesn't need to be making enemies. We go to such a small school (about 140 students in total) that making enemies with certain people can cast you into a social graveyard.

Provide a brief overview of the text.
<bot>: Love polygon has put us in a *sticky* situation, but I want the best outcome for my little brother.