MIL (F45) Me (M24) Keeping secrets?

If you haven’t read my last post go check it out! Been here for a while and have posted before but deleted.

I have a few stories or instances that make is easy to fantasize about my MIL

So we Sna chat every once in a while. I always Sna chat first. And she doesn’t seem super interested in talking sometimes. But here’s the weird part. She doesn’t tell my girlfriend any of what we talk about.

For example we talk about shows with nudity in them. I have asked her to recommend some shows and the one she said I should watch is called obsession where the FIL goes after the son’s wife. And we both enjoy GOT and other nude driven shows. I asked her if those are her favorite type of shows and she said so.

There’s been times where I compliment her. For example I have complimented her bathing suits I told her they look good on her. I recommended she try a bikini because she only sticks to one pieces. I tried to tell her how good she would look but she didn’t budge. Just subtle replies like “thanks”. To the point I said one pieces define curves too and you’re a “hot mom” when she says things like she’s too old and fat for bikinis.

And just one more example where I had a trip planned for my girl and I but she couldn’t get off work. So I asked MIL if she wanted to go. She said idk I don’t think FIL and my girlfriend would like that. I said what do you think would happen. She didn’t really reply and I said something about having your mind in the gutter. She came back quick to say no. She couldn’t come up with an excuse to use to say why they would be upset.

All of that and more. My girlfriend knows none of

What do you guys think? I can think it could be 1 or 2 things. She’s protecting my relationship. She’s not interested. She’s interested and doesn’t like to text