There might have been a bug in the regular version up to 0.5.2 about that, but it's fixed normally in v0.6. Go back and see her and she should want to have sex. You need to have told her you've reached level02 in the dialogues, and quest06 needs to be finished. No requirement of hero vs route.
I got a problem: I skipped to part 2, did Quest 06, then did Mission 05, then saved the game. Then when Mission 06 was triggered, I tried to talk to Lois but she kept requiring me to do photoshoot. After two days passed, I tried to load the save, but Mission 05 disappeared from the list, forcing me to do it again.
Tried to load the Auto Save, it didn't work too.
Is there any way to fix it?