Amber Rose -- Ends Muva's Day with a Bang (PHOTO)

Amber Rose ended her Mother's Day celebration by calling someone daddy ... we're betting.

Amber snuggled up to her latest BF, Machine Gun Kelly, as they stepped out in NYC to party with friends at Cafe Felix.

Muva was noticeably low key on social media all Sunday -- so she was probably hanging with her 2-year-old son, Sebastian. But every Mother deserves a little me time, and it looks like Amber got hers.