My husband has a J-tube and is almost never nauseous. He has just started treatment though, so that may change. He is into his second week of radiation and had his first chemo session on Monday. He has a J-tube because he had gastric bypass surgery for weight loss 3 years ago and it was easier on the day of surgery to insert the Jtube than to find the remnant stomach(hiding behind his liver) and insert the Gtube. Your wife may benefit from the Jtube. It does take us 8 hours a day for feeding since the tube is much narrower and must be fed at a slower rate, but if she sleeps through the night it can be done as she sleeps. DH is up and down all night, so we fit in the feedings during the day.