Dear MIMsters: I Feel so Guilty about Doing this with My Husband

My husband and I do not live in the same country. We have been living apart for over two years due to his inability ti secure his legal documents yet. We have one son. How we manage the situation is by talking on the phone regularly and by doing video calls but something has just happened and I feel so guilty.

My husband is a man who loves sex so much. Last week, when we were on a video call with each other, he asked me to show him my breath and I did. He went on to ask me to show him my private part and I also did. This was on the same video.

My husband masturbated while watching my nudity until he was satisfied. When he was done, he told me that he was so happy.

He called me again on another day on a video call and is asking me to do the same thing we did yesterday and I yielded to him. The problem is right now, I feel so bad about this. I feel somehow this could have a negative effect on our marriage. Am I right? Should I stop this and how do I make him stop? What do you think?