All my life I've had this problem. If there is an open jigsaw puzzle in the house I'm working on it.
I'm working on it until it's done. I just can't help it. I try to set limits. I tell myself "30 minutes and then go do the laundry". It never works. I find one piece that fits and then I have to find another. I'm afraid that poor Grace has inherited this problem. She might even have it worse than I do. I'm not sure that's possible, but considering that we opened this cute 1000 piece puzzle Saturday afternoon about 3ish and had it completely put together before 11:00 and that was with a quick break for dinner. she is well on her way.
Needless to say we were pretty proud of ourselves. Besides, that left all of Sunday to be productive....