Gift to son in law

Read definition of relative in income tax.

(i) spouse of the individual; (ii) brother or sister of the individual; (iii) brother or sister of the spouse of the individual; (iv) brother or sister of either of the parents of the individual; (v) any lineal ascendant or descendant of the individual; (vi) any lineal ascendant or descendant of the spouse of the individual; (vii) spouse of the person referred to in clauses (ii) to (vi);]

in short you can give the gift to son in law without attracting any tax

So the gift from a woman to her son-in-law won't attract clubbing provisions, unlike gift to daughter-in-law.

yes. clubbing wont apply in this case