i have son who is 4,when i got pregnant my husband and i just got back together after 6month seperation.i then found out i was preg,i asumed by my husband,when he was bout 1 we divorced and i started talking with the guy i was seeing during our seperation,who i later found out is the bio dad,but my son calls my ex dad and sstill ask bout him(he has moved and does not have contact with him)my ex know he is not the "dad".but he wasnt real interested in him even before he knew,but now im seeing the bio dad but my son doesnt know (that he is his bio dad) and kinda of acts like he doesnt like him,i thought he would forget about the man he has called dad and i would tell him about this,but i dont know when i should,he is so young i dont know if he would understand,im so confused,i want to do the best thing for him,any suggestions.