What do y’all think

So I’m over it but my gf searched this one girl on Facebook multiple times well of course he liked a picture of her from 6 months ago so I looked at his other history and all on his phone (Ik wrong but I had a bad feeling). Of course out of the 200 pictures in the album he liked the one of her in a bikini with the bathing suit that has black covering over the nipple and all and then clear around the outside (basically you see her boobs except for like a half dollar on each). He claims it was an accident and all but like really what are the chances. I feel like he’s lying and likes her a lot. Her family is friends with his and they spent Christmas eve together ( I wasn’t there cause 1. Didn’t know his parents invited them 2. I spent the day with my family. Do you believe that he accidentally liked this picture? There is a whole backstory of how I told him to stop texting her cause she was flirty and all too.