Bit of background to start.
My family have owned a small shop for over 40 years and as the only child, I've worked there from a young age. Naturally, I was expected to take over when my parents retired and this happened about 1 year ago (I'm 28 now.)
Up until 18 months ago I was in a Long-distance relationship with DP (now 29)for 3 years. He lived/worked in London but would fly up (or fly me down) every other weekend. Last January, he took redundancy and moved up to live with me. My parents at this point were beginning to indicate they would be retiring soon. As DP was working only 20 hours a week (contracting work), he offered to learn the ropes to ease the transition. He started working Mon-Sat 4-9am in the shop and took to it like a duck to water. My parents, who weren't enamoured with him initially, really warmed to him when they saw how hard working and reliable he was.
In our small town, we're the only shop that really offers News delivery. It was a small part of our business but DP and I were able to build it up into the core of it going from 15 paper rounds to 40 within 6 months (the time my parents retired). Since then DP has taken care of the early mornings (including administering the paper rounds) while I do the rest of the day to day in the late morning/early afternoon. On a Saturday, it is particularly busy so I will be in with DP, although he leaves early to deliver newspapers in the rural areas. It is on Saturday that we pay our Paperboys/girls and this is the only real interaction I have with them and where my problem is arising;
When my parents retired, we had 24 paperboys and 16 paper girls. In the 1 year DP has been in charge of administering paper rounds, 17 boys and 6 girls have left for various reasons. 21 of the 23 new recruits are girls so now we are at 9 boys and 31 girls. It's not unnoticeable that a lot of them are quite attractive young girls. I know for a fact that as many boys apply for rounds as girls as they usually come in at lunchtime, while I'm usually still in the shop.
I'm beginning to get a bit suspicious as obviously I don't really get to see the girls' interaction with DP as we're never all in the shop at the same time. Given that we were in a Long-Distance relationship and with how busy we've been with the business since he moved back, I've never really noticed how he acts when we're in the presence of others.
AIBU to think there is something untoward here? Could there be a simple explanation for this?
I'd be grateful for any advice on how to approach the subject with DP