
Before I get further into this is this incest? Rishar calls him brother and although I know their not directly related are they blood related?

No, they are not related in any way. Risher is a person who was taken in by the king because his omega father was the king's first love. The prince was born from the king and the queen. He called the prince brother BC they knew eachother since young and the prince was a bit older than him.
However, don't read it yet. It is still in the peak or just the start of conflict between the prince and his "mother". Let it marinade for a while.

OVER THE PHONE?! It's so random what TT he was making a big deal about it for so long ahhhh even if it's over the phone I wish there was more emotion/emphasis behind it. It just kind of happened :( ah well we've only seen one side confession im depending on the reciprocal!

I agree the phone is not the best situation, but the timing is fitting. Red head deliberately said that to create a deeper bond despite the distance, because he's afraid the other is going to have a rough time and he won't be there for him. He reassured him firsthand and asked for communication later on, no matter of what will happen. I think it was sweet and thoughtful

This is really cute but the two sa scenes (the one last season with the main couple and the red head) just seem out of place. I still would ship a three way cause I think the red head has a cute personality but man I really hope this is the last time with that kind of scene. I ignored the last sa scene from last season and I'm gonna pretend this didn't happen cause it's just not important to the story nor did it need to happen either time? Authors please stop using sa as a poor excuse of a plot device. Unless it's actually used for something like trauma and it's not explicitly shown other wise it's just distasteful and weird. Hate that this shit is normalized in webtoons it ruins the story.

The first one was "well written" if anything. It was clearly shown as something wrong and even in fiction (when Uyun said to Jinhyeong that he normaly think they need to go to jail for doing it). It wasn't at all romantized. And it didn't happen that randomly. Jinhyeong had a self destructive mind set and did that for "kaboom" his relationship. But either way, SA is always a touchy subject so it's understanble that peoples will always be uncomfortable with it whatever form it take. At least it wasn't one we see regulary in older Omegaverse BL. Those one were sickening to say the least.
For the second one, I agree with you. It didn't go far, but was a bit out of place and without real purpose.
Did he asorb part of sung into his shoulders TT and ain't not way that was enjoyable he just tuffed it out