This is cheating right?

[TStokes]

if so who at party do i send this to? There are three players left I am the shortstack. Player A raises enough to put me all in and I call. Player B is big blind and before calling says check it all the way. They check it all the way but I double up. Then about 5 hands later the same situation happens and he says three check again before calling. They checked it all the way that time to. I ended up winning but is this cheating and should I send an email?