He hauls back, taking advantage of her grip on his arm and his on hers to brace against her attempted slide, hoping to arrest her movement enough to throw her off. He's skinny, but there's a decent amount of wiry strength to him after months of fighting and travelling. Pushing against her weight pulls on the partially-reopened scar between his shoulders, but he grits his teeth against the pain and moves his back foot around to knock her feet from under her while she's still off-balance and he still has her sword arm limited.