Kids and stepkids names tattooed?

This could go in one of two groups, but I’m posting it here. I have my (two) stepkids even though I call them my kids full time minus maybe two weeks out of the year max. I have a bio daughter from before I met my husband and my husband and I are expecting our first. I got my daughter’s name tattooed on my foot when she was six months old. I plan to get my sons name tattooed on my other foot after he is born. My husband and I have matching tattoos and he has his wedding band tattooed because he doesn’t like jewelry, works on cars and has bad eczema so it would rub if he had a real ring. Our matching tattoo isn’t our names or initials. He has king of hearts and I have queen of hearts.

Here’s where things get complicated. My nine year old (step) was complimenting my tattoos today and asked me how many I have. I said five and I’m not done yet. I didn’t tell her my plan, but my husband and I talked about it over lunch today. I don’t want them to feel left out if I have half of my kids tattooed including their half brother and not her and her little sister, because they call me mom. He had the idea of maybe an anklet with jewels with their initials, but I didn’t have to. Then my MIL moved in with us yesterday. She brought his class ring she has had this whole time and gave him his grandfathers watch today. Well tonight he was looking over his ring and he said “I know I got something engraved I just can’t remember.” And then he found it. His first girlfriend and first fiancé’s initials. And he goes, “that’s why you don’t get tattoos,” and now I’m lost again. He doesn’t have my daughters name or initials nor his kids, nor has he mentioned this kids and I haven’t and wont ask him to, because it’s been on my body since before we met. I just don’t know if I should get a piece for my step kids, since me and him have a match also or if it’s too much of a risk.