I'm your girlfriend and I've planned something really special, so I sit down in front of your and begin to dirty talk. I tell you to stroke for me but as soon as you jerk upwards I instantly hiccup and feel slightly strange. I shrug it off and continue to tease you.. again telling you to jerk up and *hiccup*... my clothes begin to feel tight. For some reason, every time that you jerk upwards I hiccup and I begin to grow bigger!!! As son as I realise what is happening I panic, but by that point you're already way too into it and you can't help but keep stroking your cock. I grow bigger and bigger, turning into a giant!!! I have to strip out of my clothes before they rip and before long I'm so big that I'm touching the ceiling!!!