I have been playing the game for weeks now. For my first playthrough, I played with the time limit and ended up with Evelyn (pregnant). Then I started playing new games plus without time limit (in order to be able to end the game by day 40). I have got endings with all main love interests, including the threesome route with Evelyn and Callie (it is a pity that Callie did not want to get pregnant this time). But also got the endings for Belle, Thorn, sister Agnes and the royal sisters.
I have not tried getting endings with Erato or the Leanan Sidhe. I have not tried casting absorption on the demon either. Maybe I will try that next time.
All in all, very good game. To be totally honest, I have grown a bit tired of playing it after so many playthroughs, but that is to be expected, I guess.