This is a continuation from my last story. After my last massage session with my MIL, we had shelter in place enforced, which made it harder to see her. this past weekend, she came over as she had unbearable pain. I was asked to massage her again. rest of the family was busy playing games and cooking, which gave me some assurance that no one will be disturbing me. I asked my MIL to go come to the guest room, our usual massage space. She took her full sleeve shirt off which left her with really light t-shirt. She removed her bra and laid face down. I grabbed the t-shirt and slid it up to her shoulder, but t-shirt still covered her boobs as she was laying face down. As I massaged her back, I found a knot in her ribs area which was close to bottom of her tits. I followed that muscle up to her muscle near her arm pit and massaged it lightly. She let a huge sign out as muscled pained. She didn't know that muscle had ached so much. I told her that this muscle would have both back shoulder and ribs tight as it joined the two. I asked her to roll over to her side so I can easily access her ribcage and armpit area. After working on it for few minutes I asked her to lay on her back so I can massage her ribs. As usual, I'm always trying to massage her ribs which still hurt due to an old injury and touch her boobs as much as possible. Since her muscle near arm pit was hurting I tried to massage from both front and rear. Which game me very close touch of her 36C boobs. I took it up a notch and started to massage her chest from middle and around her boobs. She didn't say anything. I loved the light touch to her boobs. After few minutes I asked her to sit on the edge of the bed. I placed her both hand behind her head and started to massage downwards from underarm to ribs. Then I started following the ribs from back to front, which made my hand slide under her boobs and had great feel on top of my hand. I really enjoyed it and started to have hard on along with heavy heart beat. I asked her to take deep breaths so she can open up her ribs and relax those muscles. I kept massaging her rubbing her boobs from the bottom. After few minute she asked me to stop and said her body is getting excited, which is scary! I loved hearing that, but played cool. I said I understand body reacts differently but I didn't have any other intentions other than making her feel better. She said of course she knows that. But asked me not to say anything to my wife. Let's see what happens next...