Sister in law HELP

Okay y’all. So I’ve known my sister in law for 7 years. We got along decently for a couple years, then I had a miscarriage a couple days before her wedding. Being 19, I had no real idea what was going on and didn’t ask for help dealing with it- not even my now husband knew at the time. I got drunk at the wedding for the first time in my life, and made a scene (which I regret to this day). We didn’t talk much after that.

Flash forward for 3 years and they find it they are having a baby! The miscarriage issues came flooding back and I distanced myself from them because it hurt too bad. I wasn’t involved in my nieces life until recently.

Now, I’m pregnant!! And my sister is law has been the most amazing human being on the planet. Like, I don’t deserve her in my life after all my bullshit. She’s so damn excited. She gave me all of her old baby stuff, so I literally only have to buy a crib and a couple small items. If I have a girl, she’s giving me my nieces old clothes. She’s planning my gender reveal and going ALL OUT and refuses to let me pay for it. So, I need help. How in the world do I show this incredible person in my life how much I appreciate everything she’s doing???? I can’t think of a single thing that would be enough.