I need advice. I'm in a bit of a predicament. My 22 year old is getting married next week. I've been helping out with the wedding where I could. My daughter wanted a live band and she didn't want to pay for one so she asked my 15 year old. My son sings and him and his friends have a band together. They've played in talent shows and won money that they used to by new speakers. They write their own songs. My daughter asked could he do it for free as a wedding gift and he said yes. I told her that's a bad idea. I love my son to pieces but he's the main singer and plays the lead guitar. He has autism and just gets into weird moods sometimes. So sometimes commitment isn't something he's good at and if you push him he will just shut down. I told her it's probably best not to because if her brother gets into a weird move they don't have a lead singer and no one to play lead guitar so it would end poorly. Especially since his friends have weaker singing voices. I told her she should just pay for dj or something. But she insisted. Well now there's a problem. My daughter hurt them practically for her wedding and ALL the songs are sad. She said she needs happy songs for her wedding. I told my son. He said he can't sing happy songs because he's too sad. I asked why he's sad and he couldn't really give me a reason. He said he's been sad for a little bit so he can't sing happy songs. I tried to tell him a wedding needs happy songs but he said he can't if he's not happy. He's in a weird mood like I feared and now my daughter is panicking. Her wedding is next week. She doesn't want her wedding to be sad. I've been careful on how I speak to him because he will shut down but it's looking like if he's not happy on her wedding day he's not singing happy songs🙁