So you finished the game's tutorial? Good :)

If tutorial (part 5) bugged out on you and gives you a softlock (Guild 2 v4.211 usually does with Fajeth's MegaModPack v2-0-95, as romance interest works for an other dynasty), you can fix it by the following :

Auto-marry :
- open /Scripts/Campaign/Tutorial_5/B_Marriage_3.lua in Notapad
- Add line:
SimMarry("#Player", "#Spoose")
to the end of Start() function, immediately after (next line)
SetExclusiveMeasure("#Spoose", "Marry", EN_PASSIVE)

Auto-pregnant :
- open /Scripts/Campaign/Tutorial_5/C_Children_2.lua in Notapad
- replace line
if GetState("#Spoose",STATE_PREGNANT) then
with line
if true then

(credits: solution found in a steam forum comment by steam user TitanGarvey, corrections - me)

Error's text (for googling):
* wants to marry *, but * has different plans ... Because of the work in * for the * dynasty, * has no time for a romantic relationship. Your courtship thus has ended but at least this rejection was a valuable experience for *.