I have the same problem, the beach scene with Grey-f is not available. Or Grey-f hasn't joined the adventures yet. I have no sparkling note left of Ryen's bedroom and I can't talk to the guard in front of the gate.
Completed steps are
1. Brothel scene with Lady Akira
2. Marriage with Trey-f
3. Fürstenstein event and threesome.
4. Pandora's events.
5. Scarlett and Grey-f bondage scene.
What am I missing. I am using version 25.12.18 on Android.