My Elven Foster Mom Loves Me So Much That She Won't Let Me Go on Adventures!

Goddess was fucking done. Also, there are multiple levels of complexity thrown into the air by the concept of this isekaied forbidden love: 1) Grooming,-but-not-quite-grooming, because the mind of the protagonist was an adult that retained his adult mind while in an infant body. 2) The elf is long lived, as evidenced that she hasn't shown any aging despite living for decades before encountering the protagonist. 3) Mother complex inseki relationship that apparently had plenty of teasing moments before the full blown lust feast that happened in this snippet. This kinda erotic story would be well served with a full blown light novel in my opinion, sadly, we only get this juicy manga highlight...