4 Answers

Female dogs will do that! She doesn't mean to. It just happens. Is she spayed? That might help.  Don't punish her, please.

As the beta member of the household, she is very nervous of her social standing, and when a new person enters the home, is even less certain.  As she gets more settled, this should subside.  Have the guests pay less attention on her, excitement also may be the stressor that weakens her control of her bladder. 

My dog did this for years and then one day her bladder ruptured...she was seven so laid out about 6K to get her better- she never peed when people came to the house again.  She was 2 mos shy of 14 when I had to put her down.  Please let the vet examine her...bring in a urine sample too...I wouldn't want your dog to go thru what mine did (PS The vet(s) told me the peeing was normal behavior-Maybe it is but not for my dog.

 Wow !  I'm so releived I thought it was just me.