"Beyond excited my baby niece is here and she is happy and healthy as can be," Tony's bloodline Shane captioned the photograph above with his sibling and newborn. "So proud of my brother @t_raines and @alyssamgiacone for becoming such amazing adults and now parents. I couldn't be any happier right now! My niece is finally here you guys!!!! #IslaRoseRaines #Rainesbaby #uncleshanelovesyou"
While the dad hasn't shared any social media updates, Isla's glowing uncle shared a side-by-side of Tony's girls and gushed how he is "grateful" for his petite relatives.
Offer your well wishes for Tony and his family in the comments -- and for a fun rewind, check out Alyssa's cameo on Real World: Skeletons in the clip below! And be sure to catch Real World Seattle: Bad Blood on Wednesdays at 10/9c.