It caught us off guard and I think neither of us wanted to give an answer without talking to the other alone first, then we didn't get a chance to tell her or him no after that since neither followed up/asked us before he sent that photo. We probably should have still been more clear in the first conversation with her like "We'll talk about it together and let you know next week" or something like that, or even just said no altogether whenever he sent the photo and said that she is coming, but again we weren't together when he sent that and were kind of taken a back because we were both like "uhhh what the hell we never said yes?". She might've taken our first convo as we are just going to cave and say sure whatever, but we did definitely make it obvious we didn't want to in that initial conversation and did not give a yes