4 year old dog peeing and pooping in the house

Question
My daughters have a 3 year old rescued from the street as a puppy.  I say daughters because they both keep the dog from time to time depending on the others travel situation.  The dog is a female and was found on the streets of Baltimore starving.  She lived for 2 1/2 years with one daughter in Baltimore.  Recently she has moved to my other daughter's apartment in Arkansas.  She is a very affectionate and obedient dog.  She loves to play and loves other dogs.  She does adore both of my daughters and does not seem emotionally effected by the move.  However, she has been peeing and pooping periodically in a room unseen. She was originally crate trained but as she became older and more trustworthy this was abandoned.  She does not necessarily pee when she is left alone.  in fact usually when my daughter is home.  My daughter does have a boyfriend who also has a female dog.  The dogs adore each other and play rather rambunctiously it does get on the boyfriends nerves a little.  We suggested that the dog be kenneled again when no one is home to see if she would break out of this.  I think she is a little jealous of the boyfriend and his time with my daughter????

Answer
This sounds like a wonderful dog who came into some great fortune when she was adopted by your family.  Housetraining skills are often lost or confused when a dog is moved from one living environment to another.  By going off to a little used room, the dog is actually attempting to avoid the living space and is (although it doesn't appear so) actually demonstrating her housetraining skills.  Since she does not urinate when left alone, crating would not help and in fact might heighten her anxiety.  Your daughter must close off the rooms not being used when she is at home; confine the dog to one room, such as a kitchen, when she leaves the house; reenforce appropriate elimination outdoors with praise and treat; and if necessary put a very long, very lightweight indoor leash on the dog so she cannot "sneak off".  Give the dog some time to habituate to her new environment.  Also, tell your daughter that her boyfriend had best curb his temper around someone else's dog.  if he is unhappy with the level of play between the two dogs, he should leave HIS dog at home.