My partner's car is in the mechanics so he has to borrow mine now and again. Last night he wanted to take my car to go to the gym at a family members house, he came back later, said he was exhausted and went to get a shower. This morning I went out to take my eldest daughter to work, she's very tall so I noticed when she got in that her passenger seat was pulled forward. I asked her if it was like that yesterday and she said yes but she put it back again. I therefore go straight to thinking that my partner has had someone else in my car. I ask him this morning and his answer is " no" and when I ask him again he said was it from the previous day when his tall son was in the car, I said no as I had picked my daughter up from work in the evening before he borrowed my car for the gym, then he gave the most unplausable explanation, he said "no, I tell a lie, I moved the car seat forward to put chocolate bars on." I'm dumbfounded by the all the answers he gave to me. Am I being unreasonable for thinking he had someone else in my car?