Around a month ago I brewed a porter I wanted to add coffee to. I used decaf because my wife's doctor said so
I used 4oz of ground coffee put into a large peanut butter jar and covered it with cold water, and put it in the fridge for 24 hours. The coffee itself was pretty smooth, so i added it to my bottling bucket, gave it many tastes, and decided there wasn't enough coffee flavor, so I refiled the jar with cold water, shook the heck out it, and then added the same amount of water again. I remembered later of course, that coffee might add bitterness, and at the third week in bottle, the coffee bitterness was overpowering for me. Now at a little over a month in the bottle, the coffee flavor has mellowed quite a bit, and doesn't cause me to pucker while drinking it. The one thing I should have done was back off a little bit on the bittering hops and let the coffee cover the gap. I am glad I use good sanitation practices, because I didn't even think about the unsterilized coffee grounds potentially causing bottle bombs. Does your wife say your home brew hobby has become an obsession? Is the proper response, "Okay honey, I guess I shouldn't take the time to brew your favorite flavored beer anymore." The look she gave me was priceless.