The Big ImageBoard (TBIB) - adopted (lore) adopted son (lore) adoptive mother (lore) age difference ambiguous penetration anthro anthro penetrated biped blush boss monster (undertale) bovid breasts caprine child cowgirl position duo female female on human female on top female penetrated frisk (undertale) from front position fur heart symbol human human on anthro human penetrating human penetrating anthro interspecies larger anthro larger female larger penetrated male male/female male on anthro male on bottom male penetrating male penetrating female mammal mature anthro mature female mother (lore) mother and child (lore) mother and son (lore) nipples nude older anthro older female older penetrated on bottom on top parent (lore) parent and child (lore) parent and son (lore) penetration semi (artist) sex shota size difference smaller human smaller male son (lore) straddling toriel undertale undertale (series) white body white fur young younger human younger male