Right here.

"Let us waste no time. Shed your armor. We shall fight right here."

"Very well." Sif begins to remove her armor. You watch as she takes the time to remove it, piece by piece. Eventually she has removed everything but the leather pants, she wears underneath. She turns to you, with her perfect Asgardian breasts on show. "Shall we begin?" She asks.

"Very well." You respond. She runs at you with her fist cocked back and her breasts bouncing. You use your mental powers to slow her down and slip out of the way and trip her up. She falls to the floor, but rolls to a crouched position before lunging at you. You again use your powers to make her use 5% of her strength and speed. Allowing you to block all of her attacks. She throws a kick, which you grab and lift, causing her to fall onto her back. You think now would be a good time to end it. You just have to decide how to make her submit.