Carcel always had a strong propensity to love her. During marriage is when both got the chance to know each other better especially when living with each other in that small house. Though he fell in love first, Ines wasn’t far behind. She fell for him during the first six months of marriage after plotting for 17 years to dump him. She didn’t expect to fall for him at all.
Do you always have a clear reason to love someone? My love for my husband of 7 years is simply because I enjoy being around him and we share many tender moments.
The way I read it, cancel started getting an interest in her because she was a mystery and she didn't want him, she was like a forbidden fruit. After they got married, they shared a life together, made memories and fell in love.
His love didn’t come from pity. Remember just before he realized he loved her, his mentor, Captain Noriega, told him he was in love first and he denied it. It’s only after returning home and finding Ines near death that he realized he loved her and cannot bear the thought of her dying.
Also, we have seen all the previous timelines and he always fell for her and loved her secretly. He’s obviously attracted to her on a deeper level because they never had any intimate or physical relationships in the previous two lives. Therefore, he seems to be deeply attracted to her.

Question : why does escalante love ines so much? Before the marriage he went out with mutiple girls to give the impression that he is a plyboy to escape the assassinations, then when he saw her in the wedding day he was mesmirised by her beauty , then boom boom boom smexy time , then felt pity for her when he knew about her sickness, then?