How many times can Kas get you pregnant?

[Kadioc]

I've finished most of the events and have unlocked the Dream Palace, but so far only two encounters resulted in pregnancy. Are there more or is that it? Based on what I've noticed, it seems the knock-up chances function as follows:

Tutorial: no
Halloween Picnic: no
Frostwood: yes
Winter City: yes
Dream Palace: no
Midwinter Festivus: no
Temple of Sin: no
Siege of Khor'minos: no

 

[Upcast Drake]

Pretty sure those 2 are the only ones for now.