My parents?

ok my parents i think are going to get a divorse because she was talking to my 18 year old sis about it and i'm onley 12 and so thats a lot to take in and they were saying about like child support and how like to not sleep with him and all of this and i don't want them to;( and its really hard on me and they just got 2 new layers i need hel p what am i going to do? i don't want them to get a divorce help