Good methods for painting NSFW figures?

I have a few nsfw(ish) figures where they have weird barbie doll skin mounds and I wanna paint a basic vagina over them, with either some light blush, shine, and a outline with a clit(Since that's kind of all the depth of it would allow); Or maybe trying to do something more complex with labia or more detail.

What markers or brushes would be good for soft blush and reddish human pinks?