I found myself in this position just this week. We met on Friday and I've been struggling some w/ family stuff and it's a transition time for me, which is always tough. We didn't get to cover everything I'd wanted on Friday and I was going into a weekend w/ nothing planned and then I contacted my mom to see about mother's day plans and that was a frustrating conversation. So, soon after getting home from my Friday midday appt, I asked if I could come in on Saturday morning. We'd had to change the time of my Friday appt and I remember her offering earlier in the week a Saturday at 11am as a possibiity if she couldn't get one of her Friday afternoon people to switch for my earlier Friday time. She emailed back Friday early evening saying that the Saturday morning time was mine if I wanted it. I went in feeling guilty and after our meditation to start I even asked if everything was OK with us (i.e., if she was OK w/ having given me another time). She looked at me and I said before she could that if it hadn't been OK for us to meet that she shouldn't have said yes and that if she did say yes and didn't want to then it was her problem for accepting to meet w/ me and not putting up a better boundary. She smiled and said, yes, this is all true. If you do have concerns about her being angry, please ask her... Good luck!