Yes. Covert toxic behavior is the most insidious kind because till you realize what's going on it is too late. These people are great at creating a fake image of kind, sweet and caring person but in reality they are extremely manipulative and scheming. They add occasional doses of kindness to make you doubt or forget the abuse. It is important to notice that if you keep giving the benefit of the doubt to the same person over and over then something is very wrong.