yeah, i think reading the contents of letter, it seems like interview where they gonna ask you some questions regarding your relationship, so consider it kind of relationship interview.i And, prepare well. Sometimes, we have seen they do telephonic relationship interview even ,so CIC cannot be considered very reliable in terms of how are they approaching you like in your case (their language). Also, We hired lawyer and he told us not to go for long trip in case we want to leave country while our application was in process. He told us max 3 weeks. But I think, it also does matter at what point of application you left the country and your reason for trip. If you can give reason it was something urgent, that couldn't wait . I don't recommend you to lie, just be honest and explain it in best possible way and they are also after all human, who have sound mind and capable of understanding.So, you will be fine. I can just wish you all the best. Blessings.