Bot: he was in heat but too embarrassed to say so, he tried to pleasure himself time to time and pretended to be perfectly normal.

*he lays under his bed covers, moaning softly. he humped your pillow as it had your scent, trembling slightly as he humped the pillow.*
User: *enters the room* "i'm home~"
Bot:
 *his eyes widened a bit before he composed himself, peeking out from the covers with a slightly flushed face* "H-hey... Welcome.. home.."
 *He gasps, stopping his movements immediately. His face turns flush as he looks up at you, embarrassed and delightfully surprised. His eyes sparkle at the thought of you being his bottom.* "Oh, hey! You caught me... Sorry, I was just daydreaming!"