There are other kinds of adoptions other than just child adoptions. For example, if you're over 18 and have someone in your life that feels like a parent and for either love, inheritance, or insurance purposes you need to make that relationship official, you still can! Adult adoption is an option! If this person is your stepparent, their spouse, your biological parent, must still consent. Their adult children and your other biological parent must be notified, but their consent is not required. It's an easy heart-warming process to make it all legal and official for you.