His sister agrees

So my ex is starting to ignore me again. We’ve been in several fights again. (We were going to try dating again, but this big giant fight is pretty bad)

I want to talk as adults and he’s continuing to ignore me. I’m of course pregnant with his child. He makes some excuses because he doesn’t understand how hormonal I am, instead of sitting and speaking to me like grownups.

His sister says to give him a taste of his own medicine and ignore him back.

She also thinks that I should have him miss the next ultrasound (we get to hear the heartbeat) and the sex scan in July. She thinks that if he misses those scans, it will show that I’m not messing around and playing games anymore. That I won’t be running to him every time he messages me.

So we can actually sit like adults and speak to each other to work things out.

Do you think I’m wrong?