Cock Block?

Sooo my boyfriend and I were having dinner at my place tonight and afterwards we headed into the bedroom as if we've never seen each other in years. (mind you its only been a couple of weeks 😅) Well after about a good hour or so my grandma com's in the house and we hear her say "Helloooo?" Him and I spring out of bed and walk out the took casually as if we just woke up or something...think she heard?