That's why they make multi-stage chips.
You get in it, throw it in the 120hp setting and smoke some dudes, then before your wife gets back in it, put it back down in the 40hp setting and she'll have a better passing gear and get better mileage, and you know she won't be racing with your kid in the back in the 40hp mode.
i smell a six gun with a speed loader. but i dunno with that big of a son, she might need the step above the 40 horse mode.