That's great to hear, honestly. Especially when talking about a love route in the game. Because in many games the characters react "less humanely" in a way, when it comes to that subject, as if they don't feel jealousy and other normal human feelings towards their partner.
It's kinda hard to believe unless it's well written in a harem route, where the bond between the couple is strong, but there never was the monogamous idea between them.
Man, what a great game! Now that I'm playing the harem route and seeing that it's completely different, I'm even more excited about it. Also, my dislike for Melissa is pretty much gone now.