This is my first time on here so I'm not sure how to ask this, but I recently discovered that DP had a work friend who is very interested in my DP and has explicitly said so, DP went to the extent of hiding these conversations from me, which straight away was a red flag, in the conversations I noticed that the worm friend asked multiple times, if DP was interested in them, DP instead of saying no, said "I can't answer that, I am in a relationship" which would appear to me, like DP is interested and doesn't want to admit it, after this and some other attempts from this work friend, they asked if DP would sleep with them, to which DP replied "if I was single maybe"
Am I overreacting? Or is this outright disrespectful behaviour?