a “mom-friend”: a mother who is friends with another mother due to having children who interact with each other

belly, tummy, stomach, abdomen

(archaic, possibly obsolete, honorific) a person used as a form of mildly honorific indirect reference to someone / (uncommon) one's mother, specifically one's birth mother

(childish) mama, mamma, a childish form of mother, one's female parent / proprietress of a drinking establishment etc.

stomach

助け平: lewdness; a lecher

助け平: lewdness; a lecher

克介: a male given name

helper

(Internet slang) Alternative form of すき (suki)