Remember that you are traveling 20 year back and the twins are 18 both, so you slept with Scarlett at least a whole year before the time she gets pregnant
At Riley's place, there is a shelf in the left, there will be a banana at some point. I haven't been in the jewelry store yet, so I can't help with that but tell me, did you managed to take control at Riley's place?
Inside the "Options" menu, there is (at leats in windows) a feature called "quick menu". If you enable it, there will be little buttons at the bottom of the gameplay screen, one of them says "auto" and it enables the auto-forward
