Met one of his baby mamas UPDATE

So this is another post I made about the guy I'm seeing who has 4 kids by 4 different women. Like most know he has custody of all his kids. His second youngest Claire's birthday is today and she turned 13. She was telling me how she's gonna go see her mom for her birthday. My boyfriend kept giving me looks. When she was upstairs he told me every year Claire's mom says she's gonna spend the day with her and every year she doesn't or shows up high off her ass on whatever. Claire got all prettied up and my boyfriend french braided her hair into pig tails (he does that with all 3 of his girls). Well then I met Claire's mother. She looked... Rough. My boy said he was gonna get Claire but her mom said she wanted to talk to him and said she needed money. He said for what and she had the balls to say none of his business. I honestly just watched them bicker and she kept giving me dirty looks. When Claire came downstairs her mom said "I love you sweetie but something came up. I'm sorry, but I got you a card". She gave her the card and LEFT! Claire looked so hurt.... And in the card it said "Happy TENTH birthday...." So Claire has been in her room upset. I've gotten a close kind of relationship with his 16 year old son Max and his 14 year old daughter Maddie. I'm thinking of just taking Claire to do something tomorrow but what do 13 year olds like?

Update: So me and his other kids Max, Maddie, and Amber went shopping to surprise her. We bought a few beauty products. And set stuff up down stairs and surprised her. My boy and his son made a cake and we call had a party. Jesus max face himself a mud Max. Maddie said "You are so gay" and Max said "Duh" (His son actually is gay). Claire painted everyones nails INCLUDING her dad's lol. I talk her tomorrow we are going out for a grown up spa day since she's teenager now, but in the mean time we had some fun. I think I'm building a relationship with Claire! Last one left is Amber (the 8 year old) but I think she likes me too. We had a good time. And my boyfriend was so happy that Maddie let him braid her hair again. He's been a little sad she's growing up. We ate so much and I think we gave Claire a good 13th.