Tried to be spiteful

So my ex and I had a MESSY break up, he cheated, cops were called, he kicked my child and I out. So his uncle let my son and I move in with him until I got onto my own feet. Well one drunken night while my child was with his dad... the uncle and I had sex. My lord I have never felt this way in my life. I was trying to be spiteful, but this man is on my mind 24/7. & it’s definitely not one sided at all. Should we take the next step, or hold out? Because he is like 22 years older than me.🤦🏼‍♀️