These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Freud Was Right: Tita has a flashback of the time she and Pedro briefly fondled each other, where she is implied to have felt his "red-hot coal" while she's holding a sausage.
Moral Event Horizon: Mama Elena goes past that line when she beats her own daughter, breaks her nose, then calls her a crazy Lunatic.
Strangled by the Red String: Pedro suddenly asks Tita to marry him and they're suddenly madly in love. Even though he betrays her by marrying Rosaura, which makes her get angry at Rosaura, she's not mad at him (that is, when she finds out why he married Rosaura). He accepts Mama Elena's decision to send him and his wife and son away to Texas and Rosaura's decision to continue the family tradition, even though they're both bad decisions and hurt the woman he loves. He comes across as rather spineless and useless, yet Tita still thinks the sun shines out of his lily-livered ass.
One of the worst offenses in the book is a scene when the already married Pedro sums up the courage to give Tita some roses. Yes, it gives the repressed, abusedTita some solace... but Rosaura runs off crying at the scene. With Mama Elena's disapproving glance, he is frightened off to go comfort Rosaura; however, it's portrayed as a cowardly thing that he goes to comfort Rosaura after, oh you know, giving a gift of love to someone else that he never gave to his own wife.
Unintentionally Unsympathetic: Pedro only marries Rosaura to be close to Tita, neglects his wife so badly that it furthers her increasing Jerk Assery and ultimately destroys her and Tita's already shaky relationship, causes Tita quite the misery as well due to his selfishness and his stalking of her (which she doesn't forget to call him out on), and years later bullies and pressures Tita when Nice Guy Dr. Brown shows interest in her, etc. He is supposed to be Tita's One True Love and the right guy for her... WHY? Rosaura's death fixes it all and he is only remorseful because he was not there for Tita, but he gives little to no consideration for what he did to his late wife. (And does he even give a damn toward the deceased Roberto and his little sister Esperanza, his own children?)
Pedro's fondness for his daughter is mentioned incredibly briefly like Informed Love as Esperanza does become a reason why Pedro is wary of leaving Rosuara. It takes Tita to call out on his disregard for both of them, for him to realize his (unshown) affection for Esperanza.
Unfortunate Implications: "The guy who's right for you is the one who makes you suffer, takes incredibly bad decisions that screw you and others over, tears your relationship with your older sister apart, is rarely if ever there for you, and pretty much bullies you into breaking off your engagement to a genuinely nice person who has been one of your strongest supports in your long-suffering life. ~Love~ is good enough to forgive how he ruined your life for being spineless, jealous and selfish, right... Right?"