Ah yes. And that was why he went to Megan's, rather than just staying home alone. I do kind of hope that she was actually with Mark though (path dependent), even if nothing happened, it would be a starter - she might not give the handjob, for instance, because it's a different scenario, or alternatively, maybe she would go further and give a blowjob instead...
There are stats, but I'm not sure what most of them mean and how they work, as I don't think it's all set up the way I normally see it in the script files. A lot of the obvious stuff doesn't seem to have been used in the last update, like "corp" (presumably "corruption") - there are no +1 options, but there is a check for "corp" around the date with Mark. If Nicole has "corp" of 8 or more, she will kiss his dick during the handjob in the alley, if not, she doesn't kiss it. It wouldn't be hard to add in a "corp" check like this, or other variable check, in the next update when referring back to the date evening if you said for her not to go. However it's coded though, there will obviously be something to say she either went or didn't go (or got permission versus didn't get permission) as the game will need to know what part of the script to refer to.