I was slightly disappointed after reading the translation

Until now the case is just like any other Eri-Kogoro case. Kogoro did something which makes Ran think that he is going to do something for Eri and then they'll get back together. Then Ran makes Eri think the same and encourages her. But at the end Kogoro says what he was doing which is exactly the opposite from what Ran thought and then Eri is pissed and that was partly because Ran raised Eri's hopes up.
The bigger problem this time, is that Conan is the one who raises up Ran's hopes, not only that but he also believes himself that Kogoro was buying a present to Eri. Though I doubt Kogoro would forget Eri's birthday, I really don't want the end of the case to be like any other Eri case that Eri becomes angry, Kogoro laughs like an idiot and then mocks Eri for thinking the necklace was for her.
Even though I feel sorry for Ran that she her parents are like that, it's partly her fault that every time they end up fighting again and that's because she tries to bring them back together without considering their true feelings. She has a complex that she doesn't want her parents to divorce (though to me seperated for a long time equals divorced). When my parents divorced I didn't do ANYTHING to try and bring them back together, maybe because they were fighting all the time and it was better for everyone for them to seperate. If it's truly better for Eri and Kogoro to not be together then it should be that way and Ran needs to accept that.
Maybe the whole Eri-Kogoro doesn't need to have a happy (disney) ending. Maybe it meant for Ran that she needs to accept that her parents won't be together...
(But I secretly hope that at the end of the case Kogoro will come to Eri and give her the necklace and they will finally make up with each other...Ran is one of the only two characters who I can feel sorry for...the second one is Haibara of course...)