Thanks for the chapter!
MC better grow up fast cause Cecilia looks like she's falling hard for him and her instincts to bear the children of a powerful man is getting stirred up. Hero party going to be in trouble since MC knows how they fight somewhat and considering reasons for kicking MC out aren't going to get someone who overshadows Hero or the martial artist.
@rgkaw I don't think she's into shota. Usual trope is demons are into power and follow the most powerful. Also, for females meeting a really powerful person, demon or something else, puts them into heat and/or strongly desire to bear said strong person's children unless something really disgusts them like strong person completely covered with rotting flesh and reeks of decay for example. MC has contracted two of the spirits of powerful gods that demons worship, is cute, can be herself and share secrets such as passion for human romance stories that can't share with other demons, and is a good, honest kid who looks up to her so of course Cecilia is going to be interested.