I (20F) let him (21M) put lotion on my sunburn [FM]

This happened a few months ago! I had a super long day at the beach and forgot my sunscreen. I was laying down on my towel reading the whole morning. Even though it was a little cloudy all day I realized I had a small sunburn going up the back of my thighs to the very bottom of my butt.

I get home and call my boyfriend to ask if I can come over to his place for dinner. It is still a fairly new relationship and we had already decided to take things slow. When I get there I hesitantly ask him, “do you want to see my sunburn I got today?”
I slowly and timidly lift up my sundress and reveal my bright red thighs and ass to him and almost immediately notice a bulge in his jeans.
He turns bright red and is quiet for a few seconds, and then offers to rub some lotion on it for me to help ease some of the pain. I’m a little nervous at first, since we’re supposed to be taking things slow and it’s in such a sensitive area, but I agree and we head to the bedroom.