Karen P, if you are suggesting that by your daughter taking a shower that it pushed material that otherwise should have been directed out to the septic field (but couldn't be as a result of the
broken pipe) back into the sump - pump pit thereby creating a fresh stink, then the same effect should have
occurred whenever potable water was run from within the home: sinks,
toilets — said items which you didn't indicate that you hadn't used in the two weeks you worked in the home, prior to moving in.