I think I'm guilty of all of them.... Well except the kid thing (since I don't have any), but I've said "after this chapter" on a number of occasions to my bf.
I'm still new to both genres and so have yet to fully understand the difference between the two. I've done a little research on the topic and it seems PR usually focus on the relationship and UF is usually about a struggle.
I also have to admit that I'm not familiar with this series, but after reading the description of Moonburn I'd have to say that it looks as if it falls in a hazy grey area. Either way I think it sounds like it's a good one. I'm adding the series to my TBR pile!