Question: how old is ian in season 3 of shameless

title: Shameless (season 3)
text: Fiona prepares herself for her court hearing , having decided to attempt to get full custody of the Gallagher children . To better her chances , Fiona , Lip and Ian forge a will in which Aunt Ginger leaves them the house . She gets help from Veronica in getting a deceased body of an elderly woman to pose as the recently dead Ginger . Meanwhile Frank tries to clean up his antics . Jimmy deals with the sudden visitation by immigration and has sex with Estefania again . Sheila gets visited at her home by the biological teenage father of baby Hymie and his mother , who Sheila decides to give Hymie to . Shortly after , Karen returns home . Debbie runs away from her foster home after having to do illegal manual labor along with the other children there . Ian is avoided by Mickey after they were caught having sex by Mickey 's father and having been beaten up as a result . Fiona finally faces Frank in court ; the judge continues Frank 's parental rights but declares Fiona the other legal guardian of the Gallagher children . Lip tries to file the forged will from Aunt Ginger for the house while in court , but finds out that a family relative by the name of Patrick filed an ( equally forged ) will earlier that supersedes theirs .