There is a planetary system with a big planet and two moons, Luna and Laltre orbiting around it.
Luna has a pretty similar orbiting (1 earth-day) and rotating period (slightly less than 1 earth-day). It's mass is similar to Earth's.
Laltre has a very eccentric orbit around the planet.
Is it possible that the gravitational effect of Laltre over Luna changes Luna's rotating period every now and then? If so, how or when it would happen?
Feel free to add further information regarding Luna, Laltre and their relationship that's needed to answer the question.
EDIT: Note that I only would like to know if changing the rotating period of a moon is possible. Regarding the how or when is intended to have a slight understanding of what conditions make that change possible. Maybe any conditions make it, so there would be not much more to add.