It is known that the category 𝒞H of nilpotent weight modules over the quantum group associated with the super Lie algebra 𝔰𝔩(2|1) is a relative pre-modular G-category. Its modified trace enables one to define an invariant of 3-manifolds. In this paper, we show that the category 𝒞H is a relative modular G-category which allows one to constructing a family of non-semi-simple extended topological quantum field theories, and the family of TQFTs is anomaly free. The quantum group associated with 𝔰𝔩(2|1) is considered at odd roots of unity.