Complex sentence: It is also claimed that she grew up with the Krüdener family, where the father, Baron Krüdener, was his uncle; however it is more likely that she served the Krüdener family later as a governess.
Split into simpler sentences: It is also possible that she grew up with the Krüdener family, where the father, Baron Krüdener, was his uncle. However it is more likely that she served the Krüdener family later as a governess.