Tim has more than one sister?

So I rematches an episode of the rookie because I was bored and noticed that in season 3 episode 10 at minute 10 he helps Angela with her wedding dress. After he said she should wear what she feels confident in he says "[...]hang out like my uncle elliot at my niece's christening." Now if i remeber correctly he has a sister gennie has two boys so who's the niece's kid?