My save indicates that you're using an old save from yourself. That won't work. Please read the text files how to use the provided savegames -- see the Patreon post or the Mega link in the first post of this thread -- on how to obtain them.I "loaded" (via options) my save from v15 and unable to continue after Giovanna sex scene - Willy refuses to leave basement (0.16 in option)
If you are using the v020 provided bookmarks, I don't understand why you would start after sex with Giovanna? If you want to see the trick to get rid of Giulio and want to see Gina then you have to start at the beginning of that episode. Follow my walkthrough so you won't get bitten by the bug with the lost key. Or obtain the 30 MiB patch and read the instructions on how to apply it...