Returning back to Firelink Shrine, you make sure to visit the Fire Keeper who's tending to the Bonfire like usual. After trading in your Souls to increase your power, she looks at you, then at her stomach, before looking back at you. She seemed to be in a bit of discomfort.

"Oh, i sense you are leaving. Be safe on your journey..." She said in an almost hurried tone, before sighing and slowly walking to the wall, leaning on it with one hand and spreading her left buttcheek with the other.