Well, here's what happened.
Tonight, I took it over to my grandmother's house to watch with her. I told her what the movie was about (surprisingly, she had heard of it, but didn't know what it was about). I warned her about the love scenes, and she was a little turned off. Gay, straight, she's not a fan of 'love scenes' in movies. So, I promised her I would zoom past the first love scene. The makeout/kissing scenes were fine for her, though.
When we first started watching it, she was giggling a little bit. Not in the "ewww" way, but just in the sense that it wasn't something she was used to seeing, so it was a little funny. As the movie went on, though, I noticed her paying closer attention to the tenderness, and by the time the movie was halfway over, she was completely quiet (except for asking a random question now and again what was coming up -- a sign she was interested in the story).
When it came to the shirt scene, where Ennis pulled the shirts out of the closet and held it to his chest, I looked over and her mouth was wide open... she was totally engrossed. And the final scene, "Jack, I swear..." I looked over and saw tears in her eyes. I think she really liked it, heh.
Afterwards, I took her out to get some fast food to eat, and I could tell she really wanted to talk about the movie. She kept asking little things about how long the movie took to film, if it was based on a true story, things like that. So, even after it was over, she was still thinking about it. So, it left an impression.
Just thought you'd all be interested in knowing what her reaction was, heh.