Alert! Main character is in gran danger. I repeat big gay danger! Girl is so defenceless now.
Hehe, no no no. Akiho is upright and virtuous. She's the girl who promised to protect Fuuka if some sexual aggressor targeted her! No way she'll do anything untoward or indecorous to sleeping Fuuka, no way in hell.
Of course, no way in hell she'll catch some z's that night either.
It would have been better if both of them were awake to hear the weird noises that two sexual gays make in their natural doing...
I wonder if Sakurako and Nagisa have realized Akiho hasn't left. I suspect they haven't. They probably think she's gone. They probably believe Fuuka is all alone.
If they knew Akiho and Fuuka are sharing a bed, they'd go apeshit. And they most definitely wouldn't be giving them a concert of sapphic polyphony.