That second panel was probably the trickiest to draw... it's not too hard to draw a giantess next to a normal person, since they're both drawn at such drastically different scales it's kind of like just putting together two separate illustrations. But for a scene where there are two characters at different scales, but still large enough to more impactfully interact, if nothing else, makes it really hard to look up references.
Also, I want to encourage everyone to follow my friends at Pillow Princess. They're making a really cool visual novel called Camp Gash, a romantic horror indie game where you take the role of a camp counselor on a classic summer camp as Monsters abound, with the added twist that all of the monsters are potentially romanceable. You can completely customize your identity and sexuality, which will affect the game in different ways. You can even play as a futa if you so desire! The game also tracks your choices with a Horny Meter, and characters will treat differently depending on how obviously horny you've been acting lately.
The official demo will be released soon, and I'll be sure to keep you all up date on the project! If you do join the demo, I've been told that there just might be some BCC easter eggs hidden somewhere in the game, so keep your eyes open!