that plant is really light starved top it if you want............id be worring about getting it more light
yah, not trying to be a dick or anything either, but yah, you surely need some more light on her.. kind of looks like it's outdoors now, so maybe she'll fatten up some now..
instead of topping it, i'd try some lst on it instead.. with it being so tall and lanky, i'd think that she'd take well to lst, and it should help with her bushing up some instead of just keep on growing upwards and really thin like she is now..