I think that Covid restrictions are causing stress to everyone at the moment. I believe you are involved in house renovations, stressful, are semi mobile, stressful, have a little one to take care of, stressful. Concerned about your mum and you both grieving re her sister. Is OH working or concerned about income? How did he respond to your finding out about his finances? Maybe a truthful discussion with him regarding partnership, openness, no secrets and financial arrangements and obligations. Be as unaccusitive as possible but be truthful. Do you still love him and want to continue with openness between you. Does he like your mother or does he resent your relationship with him. Mask wearing in public accepted here as the new norm and is easily adjusted to. I would however be aware of the day to day situation of where you are going for a week or two before you go. Good luck