Make it more exciting for Kate

No idea if it was the ****, the sex scenes or Kate shifting around with her big ass on my dick (probably all of those), but I decided to make the whole thing more exciting for Kate too. We were sitting all the way in the back so I was pretty sure I could get away with almost anything.
I slowly lowered my hand, that was around Kate's waist, and slid it towards her legs. I massaged her thigh, moving closer to her crotch. As I inched closer and closer, Kate suddenly gasped, though quietly enough that no one else heard it. Her face was now bright red, even more red than before. She didn't say anything though.
My hand moved on her crotch and I began rubbing her pussy through her clothing. It didn't take long and a wet spot appeared. This was making her more excited than I imagined. I thought about stopping, since I wasn't sure how much noise Kate would make, but at this point I was ready to take the risk. Kate was still looking at the sex scene of the movie, but now she was grabbing on to my legs slightly and making a quiet noise every now and then, obviously getting more excited by the second.

I decided to go the full way and moved my hand up a bit, then lower again, though under her pants and panties this time. Her pussy was wet as an ocean. It was no problem for me to slide a finger into it and continue pleasuring her. The first finger was joined by a second and I continued rubbing Kate's pussy faster. I played with her clitoris, all the while she was watching the sex scenes. The last sex scene ended and the movie got louder, I decided this was the perfect moment to make Kate orgasm, so I sped up and fingered her faster, my other hand went up to her breasts and grabbed on to one of her boobs. Me squeezing her tit and rubbing faster gave Kate the final excitement she needed. She covered her mouth with both her hands and quietly moaned. No one seemed to noticed. Kate was shaking and continued moaning while I slowed down and got my fingers out of her vagina.
Kate finally calmed down and went quiet again.

'Great', I thought. 'Now I'm horny.'
I moved closer to Kate's face and whispered in her ear: "My turn now. Follow me."
She looked at me, still bright red. For a moment it seemed like she thought about it, then she nodded. We got up and quickly left the room.