Can your parents read your texts online

Just a question. I have a sprint phone and I was wondering if there is any way my parents could read my texts online or somehow through there phone or online. I researched and most of the sights said no because sprint doesn't support it. I'm just curious.... Can any one answer this for me. And if your wondering I haven't done anything bad on text just said some secret things to people and wouldn't like my parents to know...