The two examples (the nun and queen) are the scenes where player sees it, but chronologically they take time in the past (as in, before player even met them). Other girls will just compare your skill in tangential way.I don't mind the girls being "experienced" - I just don't want to listen to it or worse - see it lol. So yea, is this first scene the exception?
If you are fine seeing stuff from the past, then go for it; it's a good game.
If not, you might want to consider skipping these scenes. Technically, player isn't forced to see any scenes. As long as, they get less than 100 000 points, don't talk to camp members and don't check the bag of panties in the camp. Except last level, since you are forced to get at least 100 000 points, if I am not mistaken.
The nun recollection scene is unlocked by talking to her in camp (top-right) and Queen's adventures are learned from the bag of panties in camp (top-left). Avoid these, if you don't want to see these scenes.