"My sisters like me."
Translation:Moje siostry mnie lubią.
There are two plurals: 'masculine personal' and 'not masculine-personal'. The first one's pronoun is "moi", the second uses "moje".
The first one is used for 'groups of people including at least one man'. The other is for... well, everything else. As 'sisters' do not include a man, they are not masculine-personal and therefore they are "moje siostry".