My Breasts Are Saggy?

I’ve wanted to have sex with a younger guy for a while, I know him quite well. He’s aware and interested. I’m trying not to be too concerned with my body but my breasts aren’t as firm as they used to be and they sag a bit..not so the nipple points downward but I lost a fair bit of weight and they deflated somewhat. They’re not like the boob jobs where they’re round and perky. I’ve had a couple of children too in the past and my stomach is fairly toned but not flat and the skin sags a bit when I’m on my hands and knees..not to mention that my breasts just hang down too in that position. I work out but I don’t have a super hot body. Do you think if I just accepted the way I am and get over my inhabitions about my body and pretend it’s not a big deal he won’t notice or do you think he will still judge me and I’ll turn him off. Id rather not have sex with him at all if he’s going to be revolted over it :/