3 Add the apostrophes in the correct places. Then choose the correct answer, a or b.
1 My mothers new husband is my
a.father-in-law b.stepfather
2 My sisters husband is my
a.brother-in-law b.stepbrother
3 My sons wife is my
a.son-in-law b.daughter-in-law
4 My fathers wifes daughter is my
a.sister-in-law b.stepsister erb​