The Big ImageBoard (TBIB) - age difference anal anal penetration anthro anthro on anthro anthro penetrated anthro penetrating anthro penetrating anthro arm markings balls bed black bars black markings blinds blue body blue fur blue hair blush bobbie (rotten robbie) breath brother (lore) brother penetrating brother brothers (lore) canid canine canis clenched teeth countershade face countershade tail countershade torso countershading dialogue digital media (artwork) duo ears back english text erection explicitly stated nonconsent eyebrows eyes closed from behind position fur furniture genitals grey body grey fur grey tail hair hi res incest (lore) indoor nudity indoor sex inside larger male letterbox male male/male male penetrated male penetrating male penetrating male mammal markings moan motion lines nude older male on bed open mouth penetration penile penile penetration penis penis in ass pillow pink penis pink tongue pinned pivoted ears raised tail restrained robbie (rotten robbie) rotten robbie secretly loves it sex sexsomnia sibling (lore) side view size difference sleep sex sleeping sleeping top smaller male smaller penetrated tail teeth text tongue tongue out wolf younger male younger penetrated