Because of my dreams, the relationship is more stressed than ever. Most people who dream of extra-partner relationships worry in relative silence and anonymity about their promiscuous minds during dreams. Sleep-talking is considered a fairly benign, though still uncommon, accompaniment to dreams. Usually our muscles are inhibited from moving during dreams through a process called muscular atonia. If the inhibition is incomplete, though, a category of bizarre behaviors can result.
People can jump out of bed to fight off dreamed intruders and attackers.
Sexual attraction to an ex is nothing new. What is intriguing about attractions to ex's, however, is that our ex's usually are more attractive when we are experiencing difficulty in our lives and current relationships than when we are not. We don't like the looks of the future - so we find a retreat to the past comforting. Judging from your dream report, it appears that you really don't want to go back to being involved with your ex. In this light, I agree with you, that your dreams are symptomatic of stress in your current relationship, rather than reflecting a genuine desire to rekindle old fires.