Btw a little thing I've been thinking about before regarding this screenshot / the layout of the 1st game map. Rabiane approaches this cathedral from the back door and never goes to the bridge seen on the right of the picture, while Lilia goes to her cathedral from the bridge side. It could be a theory that the 1st and 2nd games are neighboring areas with the cathedral being in the center of the 2 areas and Rabiane / Lilia simply approached the place from 2 opposed sides.
(ofcourse this is all if we reeeeeeally wanna connect the games...in the end these two areas might be just 2 far off lands and the 2 games might simply have nothing to do with each other.)
Hell, here is another interesting idea. The observer is seen in the 2nd game as an easter egg in a dark corner. What if it's not an easter egg. Lilia does pray to the observer to get a special item...here is a new interpretation...
What if the slug you find after kicking the ass of the father is not the father...but the observer. Making the 2nd game a prequel....
Lilia and Haanja does win, and they do beat the Father...but Lilia is actually a devotee of the Observer and gives birth to it after the Father is gone, leading into the 1st game. The observer might be weaker than the father hence why it was in a dark corner hiding while the father was dominant.
Lilia is also not controlled at the end unlike Rabiane. She can freely choose to kill it, or lovingly embrace it and copulate with it.
But of course this is just another plausible theory based on a hidden Easter egg. *shrugs*