AITA for refusing to let my adult kids into the house when i'm not there?

My ex husband died last year and i moved out of the city. My children were in full support of the new change and they wanted their father's house sold.<br><br>I bought a new house on the outskirts of the city. The house has been (kind of) family heirloom it's old but beautiful. I was so excited to be close to my family because they live in the area.<br><br>The problem is my children wanted me to keep a spare key for them at some family members house so they could visit whenever they wanted without me there. I refused. My kids started sending me ultimatums saying i'm being unreasonable. AITA??