feeling more of a cuck whenever i remember this [cucked experience]

Last summer,we’ve been to a holiday to an hotel with my mom to the beach. To start shes a single mom so thats why only her and I go to holidays. So the beachside hotel was pretty good and I was enjoying my holiday,until the 4th day. A classic day there as we had breakfast and went to poolside and were laying down in sunbeds,we were soon gonna enter the pool so were suncreaming. Honestly I dont care abt it much I’m more of a type that just goes and swims when I feel like it but she wants every part of her to be suncreamed so she doesnt get burnt of sun. And the part I hate about this is that she can’t reach her back at all and I always have to put the cream on her everyday and she always murmurs. Like I’m just chilling with my drink by the pool,and I have to cream her for some time and she keeps yapping about it like put more pressure,you didnt put here etc u know. Maybe it doesnt sound that bad but idk sometimes i just wanna rest and its annoying that I do it for her again and again and she never doesn’t like it either. So where we are left,its the 4th day of holiday.Shes in her bikinis,laying face down on the sunbed as I cream her body and she murmurs,classicly. I’m like “if you don’t like it you can do it yourself” and so. Then the man,who looked like hes in his 30s laying in the sunbed next to her interrupted from his seat “Hey buddy I could help ya out with it” and while I was gonna say no need thanks or smth my mom said oh please before me and he just got it out of my hands. For a few mins he creamed her upper back sitting and chatting from his sunbed like little laughs and jokes. I was just already annoyed by her not liking anything and was back on my sunbed scrolling through my phone,not paying attention. A min or two after he asked are you married and she said no,he stand up and sitted on top of her. Idk how can I explain but shes laying facedown,he positions himself at the back of her like in between her thighs and sits there.He kept making her laugh and put pressure with his body too,like pressing himself harder into her cheeks and I could hear slight moans too at times I was so pissed. Of course the suncream is slowly continuing at this time. After that he asked her “these sunbeds are too uncomfy,I cant do it properly can we go to a comfy place very quick?” she agreed,as he takes her up and he looked at me “I’m gonna cream her well boy dont worry,we’ll be back in a while” and pat my head before they went. I couldn’t say anything but with how I was pissed at that moment and just wanted to relax I didn’t care much abt it,just busy with my phone and also swimmed. She wasn’t back for 2 hours,I went back to our room as she came. I asked where have they been and she said “oh honey just took me to his room for the suncream then i came after the beach” then said shes gonna have to shower and went.at dinner and night it flied away quickly while I was mad abt the day. whats worse is we were there for 2 more days and i cant say it was easy,however i cant write here detailedly as this already is too long but ofc up for talking more about it if you want. anyway at least i can say my mom had a great holiday at the last days i think. at that time i didnt think on it much but when i thought of it these times i feel like theres too much and these I wrote was just the start. Ofc I could still be too over it but still the scenarios that happened last days and the things I dont know makes me so weak.

What do u think of it?