I may have accidentally been texting a child instead of my boyfriend?

So I have an iPhone and my boyfriend got an android with a new number over a month ago and sometimes my messages would send as blue. He said he didn’t know why but his email and phone number were on his daughter’s iPad so I assumed that was why. So fast forward about a month and I get these texts. I’m horrified because I sent sensitive pictures the literal night before I got these texts and have sensitive messages from before too. So what are your thoughts on her waiting so long to tell me and what can we do to alleviate the situation? (The blacked out area showed my control panel)(pls help me I am mortified) EDIT: I think the mom successfully unregistered the number from Apple because my texts are only green now