Melodrama is rather like using spices in cooking. Too little and the story falls flat. What happens when melodrama istoo heavy. Melodrama when used right allows for suspension of disbelief. It this isn't done with care, the reader will scratch their head and thing "I don't believe a word of this." You want to make them see the possibility working.
Melodrama is extreme and raises strong emotions. What you need to do when writing this kind of scene is make it seem ordinary by your use of language. You need to turn this from a curse to a blessing.