There are two words for "share." When A shares something (C) with B, the verb to use is bon ("share with") and the construction is B-vaD C bon A (with appropriate verb prefixes depending on what A and C are). In this case, C belongs to or is controlled by A and A chooses to share it with B.

When A and B share something with each other (share some gagh, say), the verb to use is lIn ("share") and the construction is C lulIn A B je (or C lIn A B je if C is plural, and, again, with appropriate verb prefixes). In this case, the speaker is noncommittal about whether A or B is the one who decided to do the sharing with the other.