Mom wants to celebrate my first month of weight loss… by going out to eat

I texted my mom to update her on my 15 lb loss since today was my 1 month mark and I was super proud. Her response was that we can go out to eat tonight then… to celebrate me losing 15 lbs? I asked why I would celebrate eating less food with eating more food, and she said “because that’s what we do.” Eating out usually leads me to binge eating. I’ve only had a few meals out this past month and I always made sure they fit in my calories the day, or at least came close. It’s so irritating that family members would sabotage your diet as an excuse to go out to eat. I just needed somewhere to rant and I know a lot of you guys deal with family trying to sabotage your weight loss. I wouldn’t mind some advice on this either, if anyone has it.

Edit: there’s a lot of comments and I can’t quite keep up with them all! I just want to thank everyone for their advice, support, and congratulations. I know my mom wasn’t out to get me, it was more of a rant that people around you don’t understand how food can sometimes affect people that are trying to lose weight. To clear some things up, my moms side of the family has generally been pretty food oriented. Several women in my family have gotten gastric and struggled with weight their whole life, my mom included. I didn’t think it would happen to me- but it did and I’ve struggled for a while with weight and food. The frustration came from her not understanding. She’s very supportive of me losing weight and is very excited that I’m starting again- but many times she’s pushy and insistent on celebrating by a “cheat day” with unhealthy meals. cheat days or meals are where I really struggle. It wasn’t fair of me to assume she was sabotaging and I understand that now. I like to plan out my “cheats” so sprinting this on me just frustrated me, as I had already had my day planned out for eating and I was caught off guard. The days I had eaten out were planned days in advance because it helps me stay focused on my goal. I suggested a restaurant that I can stay within my calories and have fasted today in preparation for it- thank you to all who suggested this. This is a wonderfully supportive community and I wasn’t expecting to get so many responses, so thank you all again so much!! Happy losing! ❤️