In order to start Lucy's events, you need to have fucked her when you first met her. Or you can use the codes ifuckedlucy and truestory to get her content without restarting. :)
I had same problem and thankfully found this solution... funnily enough I'm pretty sure I did that with Luca 1st time we meet (I mean, had utility room scene afterall) yet at some point I ended up on 0/8. :)
