MIL arrived to spend Xmas with me, DH and DCs. DS 6 months has recently started babbling, 'dada' being a regular noise he makes (much to my chagrin
). Five minutes into stay, DH is saying to DS, 'who's your dada?' as DS has also started pointing/reaching for people he likes the look of. MIL looks on fondly. So far so cute. DH asks DS again, 'who's your dada?' To which MIL pipes up, 'we may never know.' WTAF? DH assures me this was meant as a joke, but I find it coarse and off-colour. We don't make jokes like that in my family and I don't understand the humour - 'haha, DIL, your child is probably illegitimate as you are clearly shagging around'. I feel like it was just an excuse to be bitchy (me and MIL don't get exactly see eye to eye). AIBU to be fuming? 