They both could feel that they were about to cum. For Liam his mother's moaned were sounds of heavenly fairy's.
Feeling the tip of her nipples between their mouths. Liam rubbed his lips on her nipples. He could also feel his mother's lips. If there was not any nipples between their mouths then it would look like that he was kissing her!
Liam was excited because this was new thing for him. They both rubbed their lips on nipples and could feel each other's lips.
Lilith felt happy when she felt her son's lips. At the same time shw checked her daughter and after finding out that she was still sleeping.
She decided to take things further. She took her nipples on her own mouth and started sucking on it. This time she wanted to provide her milk from her own mouth to her son.
Liam felt that the nipples between them was gone. He felt a little surprised when he saw his mother who was sucking her own nipples.