Tessa loves her sister!
On another note, Selah often pulls Tessa's hair now, whenever Tessa gets close enough (which is very often lately). Tessa, knowing the rules when she does something wrong, then insists that Selah say "sorry Tessa". Of course, Selah isn't quite up to this yet, being only 6 months old. Inevitably we explain this to Tessa, and inevitably she then uses her own hand to sign sorry on Selah's chest, while saying "sorry Tessa" for Selah to herself. :-D