@VBlew The glowing is the physical manifestation of the over abundance of love and innocence that overflows the hearts of Mikey, Anthony, Mickey, and Airen.
I also use it as a visualization of Mikey, Anthony, Mickey, and Airen recharging their energy they used that day while they sleep. Especially if it's been a particularly exhausting and energetic day.
I got the idea from an episode of the original 1983 He-Man cartoon series titled "The Starchild." Glowing was one of Starchild's gifts it enabled her to physically show her love for others. However, she could also use it to protect herself by createing energy forcefields, and shoot energy beams from her fingers.
As for what Mikey and Anthony thought, you'll either have to wait for the next chapter, or tickle it outta me.