Reply: I ate out my friend while she was on the phone with her boyfriend [FF]

My friend and her boyfriend have kind of an open relationship. I don't know the details but she told me that he's okay with her doing stuff like this.
Anyway, we were watching a movie at her place. It was a pretty horny movie overall and there was this pretty hot sex scene. I was getting pretty turned on and I could tell it was affecting her too. I noticed her rubbing herself through her shorts kind of absentmindedly.
Her boyfriend called and she paused the movie for a bit. I don't know what came over me but I started rubbing her leg and she locked eyes with me. I could tell we were thinking the same thing. She took off her shorts and laid on the couch. I heard her still on the phone, but I honestly have no idea what they were talking about, I was just focused on her. I pulled down her underwear and kind of looked at her for a bit. She was really wet, even more turned on than I was.
I started licking her gently at first, until she ran her fingers through my hair and pushed me deeper. I lost any of the shyness I might have had up to that point, and just went to town on her pussy. I could hear her trying to stifle her moans while still on the phone. Eventually she told him she'd call him back. As soon as she hung up, her thighs clamped hard around my head and she started to shake. I kept licking her gently as she came.
We haven't spoken about it since that day, but I honestly think about it all the time