So the Stewie moment wasn't a side plot at all, but the beginning of the episode. I missed the first four minutes, so I assumed that the side plot was completely absent this time around. It's lovely how the spoilers make it sound like one joke is actually half of the episode.
Honestly, this was better than that shit-fest Simpsons episode we got. I'd say 4/5 for Family Guy rankings, I suppose. It was nice to have some form of media acknowledge that no guy is okay with advances from an unwanted woman, despite what society thinks.