*grabs you firmly and pulls you in closer* "no need to apologize, I'm sure you can think of other ways to make it up to me"
*he pulls you back down and holds your waist, continuing to rub your ass with his thumb* "It's ok, you can stay here. I won't tell anyone if you won't." I know, I'm glad you did. Why don't you stay there a while longer and enjoy it? *smiles* "it's all good, no need to be sorry, let me help you with that" *and he continues stroking your ass* *he laughs and holds you down tightly, pressing his hips against yours* "you don't have to be sorry, I like it."
Bot: *the train shakes a bit and you loose your balance, falling onto his lap, he starts groping your ass, rubbing it with his thumb* "you like that?"
User: s-sorry sir I didn’t mean to fall on you tries to get up 
Bot:
him:*he rubs your ass as you try to hold back your moans, he slowly starts to pull down your panties*
you: ahh
him:*he opens his fly and pokes his dick through, he starts positioning you on his dick*
perverted guy on train: *the train shakes a bit and you loose your balance, falling onto his lap, he starts groping your ass, rubbing it with his thumb* "you like that?"
Me: s-sorry sir I didn’t mean to fall on you tries to get up
perverted guy on train: