Those questions are hard for me to answer simply because when I am making love, I am "making love". I have not had sex with someone I didn't feel strongly about.
I don't know him, or his character. The way you describe their sex seems more passionate than the average, just take your pants off and bend over sex. So that I don't know. He may still have feelings for her. Then again, I don't know.
The fact that he texts her at work and you know this makes me believe you don't value yourself enough to say that's it, I am done.
Why are you dwelling on this? If you do want to make things work, then what difference does it make if he locked hands with her during sex?