made a fake number with txt free and txted SO

So to begin with I made this text free app because last year when I was pregnant my SO requested this girl on ig and also in her 2 profiles on fb and I told him about it and he said no I don't know her and blah blah so I got mad becouse she had pictures on her ig showing her as with a thong and making naughty videos so I told him if he knew her or something or if he had been talking to her and he got all kissed and said he didn't know her so I let that go and a few months ago I sent her a massage on snapchat and told her if she still had been talking to my SO and she said that no that it has been a while they don't talk and she told me he was a biggi flirt so I got hella pissed and told him about it again what she had said and he said that no that that wasn't true and blah blah blah so today I was with him at his house so we were eating and he said he was ganna go restroom so out of no where I decided to make a text free number and jus txt him for the fuk of it so when he said whose this I didn't know what to say so I thought about that girl name Kimberly and I told him I was her so I was texting him while we were at his house and I'm so pissed cuz he's txting back but at the same time it looks like his not interested in talking ? So what do you guys think that he might still want to talk to her or no ? I have a feeling maybe he  xtes other girls just how he txted me back thinking I'm Kimberly by the way I don't check his phone or anything so idk if he's txted ting other girls here I'll leave you some picture of the massages I sent him and what he txted back