Personally, wasn't a trigger for me. I'm the type of person who likes to be considerate to other people and realized during my play through that it may be necessary because the degree of clinginess was quite severe. Like you mentioned, trigger warnings help in deciding if someone can play a game. Hence, why they are important.
When you get around to playing the game yourself, you'll see the difference in severity by comparing Caleb and Penelope. Hope your gaming experience is fun! :D