So I played through most of the content in 0.29 and I have to say, I'm a little sad that Sarah's route seems to be more cuckold than swinging. Outside of the one event with her sister, all the other content is either directly with the MC or her cheating on him. There's no threesomes or even couple swapping. She doesn't participate in the remolding of Noelle. She didn't participate in any of the Christel stuff outside of a lesbian only scene she video chats you with (because she's apparently cuckolding you rather than swinging with you).
I'm not sure if this is a limitation of real porn scenes or merely the direction of the writing, but I'd rather see swinging/sharing content then pure cuckold/cheating.