Think my partner still in love with ex wife?

We recently had a funeral and my partner ex wife attended, I haven't witnessed their interaction much ij the time we've been together because usually I'm not included (meeting with kids, kids are in 20s)

I saw them embrace for a very long period where at the end of their long hug they were staring in one another's eyes and holding hands like in the marriage pose, both hands right in front of one another.

The scene was awkward for me, I didn't want to say anything because of the scene which this embrace happened when they greeted and then when they departed one another, it's like no one else was in the room.

I felt like a fish out of water as when she turned up I kinda got ditched, but I understand the situation and feel for grief and respect grieving.

A couple of days later he took his son to see the ex mother in law (grand mother) they spend the day there, chopped firewood for her and took her out for dinner, she gave him a knotted beanie.
My partner best mate lives down the road, so I don't understand why he needed to stay and spend all day there too.
This is all seeming to werid and has overwhelmed me, I feel like there is unfinished business and my heart feels broken.

Interested on other perspective in this situation.
Think my partner still in love with ex wife?
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