In that case, there must be some kind of threshold or other combination of choices about which I am unaware that can lead to that outcome.
For me, however, if I'm on the path where Alan has not been helping Clara, to where she ends up having sex in bed with this blindfolded guy while in the cowgirl position and wearing a black bunny costume, then one of the following two things happens in that scene depending on Alan's next decision in relation to Anna:
1) If Alan resists Anna's attempt to "relieve his tension" by stroking his cock, then after Clara sees the photo of the event on her phone, Leon touches her crotch and removes her jacket before she moves away from him.
2) If Alan allows Anna to "relieve his tension" by stroking his cock, then after Clara sees the photo of the event on her phone, Leon touches her crotch, removes her jacket, and pulls down her shirt and sucks on her nipple before she moves away from him.