difficulty working with too many interruptions... - blondie

My mother will know I am working, will walk in my office and see me working and come in and ask me something.  She comes over periodically to check on my 12-year-old son after he has come home from school to see if he would like her to fix him something to eat, etc.  She lives next door.  Anyways, my mother is the best mother in the world, would do anything for me or my husband or son.  It is just she isn't married anymore and gets bored.  When she comes in my office to ask a question she has gotten to where she will linger and sit down and ask questions and I have to stop and answer her or she will start a conversation.  I don't want to hurt her feelings as she is tender hearted.  But somethings got to give.  I have a very good husband who never disturbs me when he is home and I am working.  If he does it is a quick question and he's gone.  No lingering.  No conversating.  My cousin is a transcriptionist too and had the same problem with her mom when she moved back home for a little while after a divorce.  She said her mom was constantly coming in there talking to her.  She said she couldn't hardly get anything done.  I am at that point now.  I don't know how to remedy this without hurting feelings.  Should i Just continue typing and try to ignore her?  I don't know.  It is so irritating.