Trial week (unsure in whether or not I actually want that job)

Hi everyone ! I've been offered a trial week in another city and the family wants to fly me in for a few days to see how things go. I have an interview with another family in my city (so I wouldn't have to relocate) and if they're interested I would definitely prefer this job as it's much more convenient for me. The other family is very sweet and I feel bad for taking the trial without being sure on whether I would move forward with them or not Any advice ?