The use of the term "soiled" diaper makes on think that the diaper wasn't just wet. Is a mother likely to allow a "dirty" 2 year old to wander around the house?
Maybe the reporting is just imprecise.
Could be. When males go after females to breed; there is a window of fertilty during the females heat cycle(about day 9 out of 21 days) that makes a female receptable and a male will really be. The male will usually be interested right before the heat begins and during this particular period. Not to say they can’t be interested at other times. This is just what I have observed. There has to be a reason for that dog to be interested.