now that it's leaked, this theory we have in discord will make more sense.
So me and Fayn believe this taking place at 2 different times. up until image 8, where Amber is licking her lips, it's taking place at Sterling's front door and at his in-home spa room. then image 9 shows Amber and Tsukiko sharing a drink at an all new Kitchen, that we believe to be Caspian's house, since he was kicked out by Kumiko in the last chapter. Than image 10 shows Tsukiko walking in on Amber and Caspian.
So Amber shows interest in Caspian's boner, which in the last chapter she mentioned that she had an interest in giving him a blowjob. in this bad end, she acts on it. Time skips to Caspian's house where Amber is having a drink with Tsukiko and then after catches Amber and Caspian fucking.
at least, that's what i think is going down.