what ?! You can have baby with cless how? He only yell at me or just send me away…
You have to take the medicine class, help him to get the bug he wants, then later take a biology class until an event with the bug happens and don't dodge it. You'll be taken to the hospital and chose to be taken care of by Cless (I think is the second option). Then seduce him, and with the fertility pill effect and boom. If you go to see him with a big tummy he reacts lol.