Mother son wedding dance song?

My son and I have always been great friends and can talk about anything. I truly love my daughter-in-law and her entire family..We listen to mostly country music.and I love Marven Gaye. Can someone suggest a song that will leave everyone in tears. A truly heartfelt song. My son is 24 and I am 53 and his Dad is 54 and we have been happily married and best friends for 35 years