Ok, lets see if I got this right. Ola Malm had only one child, and that´s Johanna born out of wedlock in may 1833: https://sok.riksarkivet.se/bildvisning/C0066499_00104#?c=&m=&s=&cv=103&xywh=463%2C-202%2C5061%2C2755 (https://sok.riksarkivet.se/bildvisning/C0066499_00104#?c=&m=&s=&cv=103&xywh=463%2C-202%2C5061%2C2755) Half a year later Ola married Johannas mother Anna: https://sok.riksarkivet.se/bildvisning/C0066499_00169#?c=&m=&s=&cv=168&xywh=-704%2C273%2C5061%2C2755 (https://sok.riksarkivet.se/bildvisning/C0066499_00169#?c=&m=&s=&cv=168&xywh=-704%2C273%2C5061%2C2755) So we don't even know for sure that he was the father? Even if it does seem likely. But his first wife also had a daughter already when they married, and her father appaerently was some Johan so Ola was innocent that time. I'm also noticing that Anna was called Jönsdotter when Johanna was born and Svensdotter when she married Ola, but she still lived in Rottorpet.
Yes. Ola Malm married my 4th great-grandmother Anna after my 3rd great-grandmother Johanna was born.
And Anna's name change from Jönsdotter to Svensdotter is also a mystery, although she was living with her father Sven Assarsson in Konga in 1828, with "oagta" daughter Johanna: https://sok.riksarkivet.se/bildvisning/C0066472_00045#?c=&m=&s=&cv=44&xywh=171%2C1828%2C2879%2C1415
On that same file, image no. 54, you can see Ola Malm in Rottorpet with his first wife Bengta's name crossed out ("Dod 1832"), and also her daughter Anna's name.
Also, someone had transcribed several Konga documents which include reference to Ola Malm and his first wife on pages 29 and 46 (found here: https://docplayer.se/19266375-Tullstorp-grindhus-grindensborg-balbrohuset-kronohuset-kvark-kvarkahus.html ).