Jean Shepherd born 1934-1935 Maine, USA

Wonder if you can help me..looking for Jean Shepherd born around 1934-35...she had a baby born in Stonington Maine while she was in high school...maybe a seinor or jr...baby born 1952...father of the baby was my father Antonio Palleria...he has passed away and my 85 year old mother just told us the true story...so trying to locate the step brother or sister...thanks for your help.