Feeling insecure. Or like in-laws.

My marriage life was good but have issues with in laws.it's never been easy time initial 2 yrs.now am ok trying to manage knowing how will they react to things.still am not comfortable with them.Even now I feel when my in laws come home my husband will behave different.but have ignored all those somehow.since my husband is out of stationNow my inlaw came to look after my 3 year old son who is studying in nursery. After school she will take care of him rest of the day till I return from work.. after work am held up with house activities.. recently am feeling ignored by my son as well at times. He is not coming to play or sleep as before.usually he sleeps beside me ..now he wants her also to be there.. before when he was living with me n my mom he have not behaved like this.. eventough he was so much affectionate to my mom.am going mad and have insecured feeling of this.. what should I do.. am not able to mingle or like in-laws.I feel so much stressed with this problem