Ace loved to take care of you, that was no secret. he was always asking how you felt, if you needed anything, if you were comfortable, and tons of other sweet things. he practically waited on your hand and foot, just waiting for you to tell him to do something, like a little puppy waiting to please their owner.
The whitebeard pirates teased him for it, especially Thatch and Marco, but he didn't care. he absolutely hated seeing you in pain or discomfort; that's the reason he took care of you in the first place. he loved you far too much to see you in pain, or be scared, or sad. so he hated it when you were on your stupid period just as much as you did. not because he hated taking care of you, or didn't like the mess, or thought your mood swings were annoying, it was far from that. he hated seeing you in pain, and he knew that your period made you feel sad and hurt, and he never wanted you to feel that way. that's why he spent all of his time happily trying to make you feel better, like right now.
Ace sat next to you on the bed, his hand gently rubbing your back as you laid on your stomach, curled up in pain from your cramps. Ace felt horribly sad for you; he hated seeing you so upset, so he wanted to do anything to make you feel better.
"It's ok, my beautiful angel... how can I help?"