All good relationship actions:
Use a text editor, for example: Notepad, to edit the "glactivites.agl" file in "\singles\gamelogic\" folder. Edit all the relationship requirements to "0".
Use a text editor to edit the "savegame?.dat" (where ? is the number for the saved game) file in the "savegame" directory in the game folder. Search for the word "money" in the file and change the number behind it to "999999".
While two people are in the middle of making love, save the game and then exit. Soon later, restart the game, and load your saved game. You will notice that there is a baby by the lovers.
Locate the file "game.cfg" in the config folder of the game's installation directory. Open the file with Notepad and search for the word "money". Change the amount to 999999999 for max money.