umm i kno i should interfear with stuff like this cause ppl consider me 'too young' too but
she or lies to u, or is honest and is upset that u dont trust her

if u saw him calling her 'hun' by instant message u should have seen what she replied, if u she didnt 'go into this' then the chance that she's being honest nd doesnt wants to hurt the other guys feelings by telling he shouldnt call her like that anymore is big (even though i think u should ask her to do that)

if u didnt saw what she wrote then i agree with carpflounder, trust ur instincts