Background:
Married for 11 years and together for 17.
H very outgoing, fun loving and flirty but never had concerns. Similar personality to me, so a bit of flirty banter is fine so long as we both respect the line.
Since married neither or us go out as much and since kids deffo not.
Both of us have male and female friends. Being friendly with a woman doesn't bother me but the dynamic between these two has always seemed different but cannot put finger on it.
H and his work friend.
I would say she definitely fits into my H's 'type'. They teach together. They are in different departments so it does not sound as if they speak every day or every week but they do seem to catch up face to face at lunch or over messenger if it has been a few weeks. She goes back to the US every summer and as far as I know they go weeks then with no communication so they are not always in each others pockets but it seems in the school they are very much viewed as a pair, so get paired up to chaperone school events and over the years they have organised several trips together as they both say if they are stuck with colleagues for a week it needs to be someone they get on with and like and apparently because they trust each other to organise and not mess things up when carting around 50 odd teenagers. Looked at messages from her when I was in the throes of pregnant paranoia and the chat is friendly but mundane. Not even flirtatious. She asks after me and H about her partner. The tone is how he talks to all his other friends. We have had her round for dinner and she has also done the same and we have went for drinks together. All very nice and above board. Done the odd favour like making us a whole load of meals when our kitchen was getting renovated and doing a food shop when we had covid or helping with looking after cat when we were away but I just can't shake a feeling she does it all to look good to H. She is very American and brings round baking, goes all out at christmas and since I have known her has always given me and the kids gifts (all our birthdays are in Late Nov/Dec so they are birthday/xmas gifts). Her and H also always exchange birthday gifts but they are stupid cheap items as part of a running joke from work. She seems keen to be friends with me too and suggested going for a wine or doing a gym class but as I said something always seems off and never felt entirely comfortable around her in the 9 years her and H have been friendly.
She has a BF of 12 years but they have never married and don't cohabit which seems strange.
Why am I concerned?
Aside from being pregnant and crying at the drop of a hat, what has made me question it all is that three weeks ago my H stayed at her house overnight. She got a phonecall at work to say her mum had passed back in the states. Her partner was away on business and she had a meltdown at work. H brought her back to ours but she said she wanted to be at home, pack and get the first flight home. H took her back to her place. He came back after dropping her off and asked me if I minded him staying to keep an eye but i think he had pretty much made up his mind while I said yes or not. He stayed the night in her spare room and then drove her to the airport at 3am. At the time I did feel like she could have reChed out to other friends but i suppose if that was me I would be all over the place too. She and her BF came by a few days ago with a restaurant voucher for the two of us to say thank you for being there for us. We have two kids and I am seven months pregnant with our third. Is it hormones or should I be worried?
H sensed I wasn't okay when he came back after dropping her off and I said how I felt and he said there was and never had been anything between them that I could check through messages etc if it put my mind at ease but I don't know. Have asked friends in the past and they have said it is a bit of an unusal one but probably because as a society we generally are uspicious of male female friendships unless they have been sustained through childhood and adolescence.
AIBU?