A weak sister is an old idiom for a timid, indecisive, undependable, or unreliable member of a group. Private dick, Tag Forester’s lawyer is telling a client how they had met as well as his girlfriend (with anger issues), Yoss.
These comix (as is most of my stuff) is meant for adults only. It contains violence, drug use, and sexual content. Naturally, it’s not office safe.